Baoji Engineering Hydraulic HYZ-800B HPU Spares

1

Oil Filter WU-40×180-J

Filter element: Glass fiber filter paper (filtration precision 180μm); Housing: Carbon steel (Q235B) with electrophoretic coating; High pressure resistance (up to 25MPa) and corrosion resistance

1. Filter clogging due to excessive impurities in hydraulic oil; 2. Filter element damage caused by pressure shock in the hydraulic system; 3. Housing corrosion due to long-term exposure to humid industrial environments

1. Replace the filter element every 2000 working hours or when the pressure difference exceeds 0.3MPa; 2. Install a pressure relief valve (response time ≤5ms) to avoid pressure spikes above 1.2 times the rated pressure; 3. Clean the filter housing surface regularly and apply anti-rust oil in humid areas

2

Filter TFX-400×180

Filter element: Polyester fiber filter material (filtration precision 180μm); Housing: Aluminum alloy (6061) with anodizing treatment; Lightweight and high wear resistance

1. Filter element wear acceleration due to high-flow hydraulic oil scouring; 2. Filter element contamination caused by oil oxidation sludge; 3. Housing deformation due to improper installation torque

1. Ensure the hydraulic oil flow rate does not exceed the filter's rated flow; 2. Replace hydraulic oil meeting GB 11118.1-2011 standard every 5000 working hours; 3. Tighten the filter housing bolts with a torque wrench according to the specified torque (18±2 N·m)

3

Filter FBX-400×30

Filter element: High-precision glass fiber filter paper (filtration precision 30μm); Housing: Carbon steel (Q235B) with powder coating; Good sealing performance and dust resistance

1. Filter clogging due to fine impurity accumulation; 2. Filter element damage caused by improper cleaning (reuse of clogged elements); 3. Seal failure at the filter connection due to vibration

1. Replace the filter element every 1500 working hours (not reusable); 2. Use compressed air (pressure ≤0.5MPa) to blow clean the filter housing during maintenance; 3. Install a shock-absorbing gasket between the filter and the mounting base

1

O Ring 24×2.4 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; High oil resistance and wear resistance, suitable for -40℃ to 120℃ working temperatures

1. O-ring deformation and failure due to over-tightening during installation; 2. Aging and cracking caused by long-term exposure to high-temperature hydraulic oil; 3. Damage caused by sharp edges on the sealing surface

1. Tighten the fastener with a torque wrench according to the specified torque; 2. Replace the O-ring every 2000 working hours when used in high-temperature systems; 3. Smooth the sealing surface to remove sharp edges before installation

2

O Ring 30×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; Good elasticity and compression set resistance

1. O-ring wear due to friction with the sealing surface; 2. Corrosion caused by hydraulic oil contamination (e.g., water intrusion); 3. Damage due to improper storage (exposure to sunlight)

1. Apply a thin layer of hydraulic oil to the O-ring surface before installation; 2. Monitor hydraulic oil water content (≤0.1%) and dehydrate promptly if exceeding the limit; 3. Store O-rings in a dry, cool environment away from direct sunlight

3

O Ring 33×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; High pressure resistance (up to 31.5MPa)

1. O-ring extrusion damage due to excessive hydraulic pressure; 2. Aging acceleration due to mixed use of incompatible hydraulic oils; 3. Damage caused by foreign objects between the sealing surfaces

1. Ensure the working pressure does not exceed the O-ring's rated pressure; 2. Use a single type of hydraulic oil meeting GB 11118.1-2011 standard; 3. Clean the sealing surfaces thoroughly before assembly

4

O Ring 35×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; Good chemical resistance to hydraulic oil additives

1. O-ring hardening due to long-term high-temperature operation; 2. Corrosion caused by acidic oxidation products in hydraulic oil; 3. Deformation due to long-term compression

1. Control the operating temperature of the sealing area within 80℃; 2. Add an anti-oxidant additive to the hydraulic oil regularly; 3. Avoid long-term compression of O-rings during storage (store in a relaxed state)

5

O Ring 40×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; High dimensional accuracy (tolerance ±0.05mm)

1. O-ring wear due to vibration of the HPU; 2. Damage caused by contact with sharp metal fragments; 3. Aging due to humid environment

1. Install a shock-absorbing washer near the sealing position; 2. Check the sealing area for metal fragments regularly and clean if necessary; 3. Apply anti-rust oil to the O-ring surface in humid environments

6

O Ring 45×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; High wear resistance and tear resistance

1. O-ring tearing due to improper installation (using sharp tools); 2. Wear acceleration due to high-frequency reciprocating movement of the sealing surface; 3. Corrosion caused by industrial chemicals in the environment

1. Use special installation tools to avoid direct contact with O-ring lips; 2. Reduce the frequency of reciprocating movement of the sealing component if possible; 3. Isolate the O-ring from industrial chemicals with a protective cover

7

O Ring 50×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; Suitable for large-diameter sealing scenarios

1. O-ring uneven wear due to uneven pressure distribution; 2. Damage caused by insufficient compression; 3. Aging due to long-term exposure to high-temperature air

1. Tighten the fasteners evenly in a crisscross pattern; 2. Ensure the compression amount of the O-ring is within 15-25% of the cross-sectional diameter; 3. Install a heat shield near high-temperature components

8

O Ring 68×3.1 GB1235-76

Nitrile rubber (NBR); Complying with GB1235-76 standard; High elasticity and sealing performance

1. O-ring deformation due to temperature changes (thermal expansion and contraction); 2. Wear due to friction with contaminated sealing surfaces; 3. Damage caused by over-stretching during installation

1. Select O-rings with appropriate temperature range for the working environment; 2. Clean the sealing surfaces with a solvent before installation; 3. Avoid over-stretching the O-ring (stretching rate ≤5%) during installation

9

O Ring 8.5×1.8 GB3452.1-92

Fluororubber (FKM); Complying with GB3452.1-92 standard; High temperature resistance (up to 200℃) and excellent chemical resistance

1. O-ring aging and hardening caused by high temperature; 2. Damage caused by incompatible chemical media; 3. Wear due to small-diameter sealing surface friction

1. Ensure the working temperature does not exceed the O-ring's limit; 2. Confirm that the O-ring material is compatible with the working medium; 3. Polish the small-diameter sealing surface to reduce friction

10

O Ring 42.5×3.55 GB3452.1-92

Fluororubber (FKM); Complying with GB3452.1-92 standard; High pressure resistance and corrosion resistance

1. O-ring extrusion damage due to high pressure; 2. Corrosion caused by acidic hydraulic oil; 3. Damage due to vibration

1. Install a backup ring to prevent extrusion under high pressure; 2. Use neutral hydraulic oil and avoid acidic contamination; 3. Add a shock absorber to the mounting base of the sealed component

11

O Ring 60×3.55 GB3452.1-92

Fluororubber (FKM); Complying with GB3452.1-92 standard; Good weather resistance and ozone resistance

1. O-ring aging due to outdoor exposure (ozone and ultraviolet radiation); 2. Wear due to friction with the sealing surface; 3. Damage caused by improper storage

1. Install a protective cover for outdoor-mounted sealed components; 2. Apply a thin layer of high-temperature grease to the O-ring surface; 3. Store O-rings in a sealed container away from ozone sources

12

Combined Gasket 10 JB982-77

Asbestos-free fiber with nitrile rubber coating; Complying with JB982-77 standard; High temperature resistance (up to 300℃) and good sealing performance

1. Gasket deformation due to over-tightening; 2. Gasket burnout due to oil leakage and high temperature; 3. Damage caused by moisture absorption during storage

1. Tighten the bolts according to the specified torque; 2. Check for oil leakage regularly and replace the gasket immediately if leaks are found; 3. Store the gasket in a dry, sealed container

13

Combined Gasket 14 JB982-77

Asbestos-free fiber with nitrile rubber coating; Complying with JB982-77 standard; High pressure resistance (up to 40MPa)

1. Gasket damage due to uneven pressure during installation; 2. Corrosion caused by contact with acidic hydraulic oil; 3. Wear due to long-term vibration

1. Tighten the bolts in a crisscross pattern to ensure even pressure; 2. Use hydraulic oil compatible with the gasket material; 3. Install a shock-absorbing washer between the gasket and the flange

14

Combined Gasket 27 JB982-77

Asbestos-free fiber with nitrile rubber coating; Complying with JB982-77 standard; Good elasticity and compression set resistance

1. Gasket tearing due to sharp edges on the flange surface; 2. Seal failure due to gasket aging; 3. Damage caused by repeated disassembly and assembly

1. Smooth the flange surface to remove sharp edges before installation; 2. Replace the gasket every 1500 working hours or when disassembled; 3. Use a gasket of the correct size and thickness

15

Combined Gasket 33 JB982-77

Asbestos-free fiber with nitrile rubber coating; Complying with JB982-77 standard; High dimensional accuracy

1. Gasket deformation due to temperature rise; 2. Corrosion caused by moisture intrusion; 3. Wear due to insufficient compression

1. Control the operating temperature within the gasket's allowable range; 2. Seal the flange connection to prevent moisture intrusion; 3. Ensure the compression amount of the gasket is within 15-25%

16

Combined Gasket 42 JB982-77

Asbestos-free fiber with nitrile rubber coating; Complying with JB982-77 standard; Good chemical resistance

1. Gasket damage due to chemical corrosion in the industrial environment; 2. Wear due to vibration; 3. Seal failure due to improper installation

1. Isolate the gasket from chemical contaminants with a seal; 2. Check the tightness of the connection regularly to reduce vibration; 3. Follow the correct installation procedure, ensuring the gasket is flat and not skewed

17

Combined Gasket 48 JB982-77

Asbestos-free fiber with nitrile rubber coating; Complying with JB982-77 standard; Suitable for large-diameter flange sealing

1. Gasket uneven wear due to uneven bolt tightening; 2. Damage caused by external impact; 3. Aging due to long-term exposure to high-temperature air

1. Use a torque wrench to tighten the bolts evenly; 2. Install a protective cover around the flange to prevent impact; 3. Add a heat shield near high-temperature components

1

3-pole Breaker GSM1-225M /3200 160A

Shell: Engineering plastic (PC/ABS) with flame retardant (UL94 V-0); Internal components: Copper alloy with silver plating; High breaking capacity (50kA) and thermal stability

1. Breaker tripping failure due to dust accumulation on internal contacts; 2. Component damage caused by voltage fluctuation; 3. Mechanical structure wear due to long-term use

1. Clean the breaker contacts regularly with a dry brush; 2. Install a voltage stabilizer to control the power supply voltage within ±10% of the rated value; 3. Conduct a mechanical performance test every 3000 working hours

2

Star/Delta Starter QJX4-50d

Shell: Engineering plastic (PA66) with glass fiber reinforcement; Contacts: Silver alloy; High temperature resistance (up to 120℃) and good electrical conductivity

1. Starter failure due to contact burnout caused by excessive current; 2. Coil damage caused by phase loss; 3. Mechanical jamming due to dust accumulation

1. Ensure the load current does not exceed the starter's rated current; 2. Install a phase loss protection device in the circuit; 3. Clean the starter's internal mechanism regularly and apply lubricating grease

3

AC Contactor CJX4-2510d

Shell: Engineering plastic (PC) with flame retardant; Contacts: Silver-cadmium oxide alloy; High contact reliability and arc-extinguishing performance

1. Contact wear due to frequent switching; 2. Coil aging caused by long-term continuous operation; 3. Damage due to vibration

1. Reduce unnecessary frequent switching operations; 2. Avoid long-term continuous energization of the coil; 3. Install the contactor on a vibration-damping mounting plate

4

AC Contactor CJX4-1210d

Shell: Engineering plastic (PC) with flame retardant; Contacts: Silver alloy; Small size and high sensitivity

1. Contact oxidation caused by humid environment; 2. Coil damage caused by overvoltage; 3. Mechanical wear due to repeated switching

1. Install the contactor in a dry, well-ventilated electrical cabinet; 2. Install a surge protector to prevent overvoltage; 3. Replace the contactor if the contact wear amount exceeds 1mm

5

Thermal-overload Relay JRS4-50357d

Shell: Engineering plastic (PA6) with flame retardant; Bimetallic strip: Nickel-chromium alloy; High temperature sensitivity and stability

1. Relay malfunction due to bimetallic strip deformation caused by high ambient temperature; 2. Contact wear due to frequent tripping; 3. Adjustment mechanism failure due to vibration

1. Install the relay away from high-temperature components (ambient temperature ≤40℃); 2. Check the contact condition after each tripping and clean if necessary; 3. Lock the adjustment knob after setting the rated current

6

Thermal-overload Relay JRS4-09307d

Shell: Engineering plastic (PA6) with flame retardant; Bimetallic strip: Copper-nickel alloy; High precision temperature control

1. Relay tripping inaccuracy due to dust accumulation on the bimetallic strip; 2. Component damage caused by mechanical impact; 3. Aging of internal springs due to long-term use

1. Clean the bimetallic strip regularly with compressed air; 2. Install a protective cover around the relay to prevent impact; 3. Replace the relay every 2 years or when the tripping accuracy exceeds ±5%

7

Auxiliary Contactor Block F3-22d

Shell: Engineering plastic (PC); Contacts: Silver alloy; Good compatibility with main contactors

1. Contact wear due to frequent switching; 2. Connection failure due to loose terminals; 3. Corrosion caused by humid environment

1. Check the contact wear condition regularly; 2. Tighten the terminal screws with a torque wrench every 1000 working hours; 3. Apply anti-rust treatment to the terminals in humid environments

8

Mini Relay HH54P

Shell: Engineering plastic (PA66); Coil: Copper wire with insulation coating; Contacts: Silver alloy; Small size and low power consumption

1. Relay sticking due to dust accumulation on contacts; 2. Coil damage caused by voltage fluctuation; 3. Mechanical failure due to vibration

1. Clean the relay contacts regularly; 2. Use a regulated power supply for the relay coil; 3. Install the relay on a vibration-damping base

9

Intelligent Thermo Control DY-2000

Shell: Engineering plastic (ABS); Display screen: LCD with anti-glare coating; Internal circuit board: FR-4 epoxy resin board; High temperature measurement accuracy (±0.5℃)

1. Control failure due to sensor damage; 2. Display screen damage caused by external impact; 3. Circuit board corrosion due to humid environment

1. Check the sensor's working condition regularly and replace if damaged; 2. Install a protective cover for the display screen; 3. Ensure the electrical cabinet is sealed to prevent moisture intrusion

10

DC 24V Power Source S-100-24/4A 24V

Shell: Aluminum alloy with heat dissipation fins; Internal components: High-quality electronic components; High conversion efficiency (≥85%) and good heat dissipation performance

1. Power source failure due to overheating caused by poor heat dissipation; 2. Component damage caused by input voltage fluctuation; 3. Short circuit damage caused by dust accumulation

1. Ensure the power source's heat dissipation fins are clean and unobstructed; 2. Install a voltage stabilizer at the input end; 3. Clean the power source's internal dust regularly with compressed air

11

4 Core Explosion Proof Plug/Socket GZ/YT-150A

Shell: Die-cast aluminum alloy with anti-corrosion treatment; Contacts: Copper alloy with silver plating; Explosion-proof grade Exd II CT6; Suitable for flammable and explosive industrial environments

1. Contact wear due to frequent plugging and unplugging; 2. Explosion-proof performance degradation due to seal damage; 3. Corrosion caused by chemical substances in the environment

1. Minimize unnecessary plugging and unplugging operations; 2. Check the seal regularly and replace if damaged; 3. Clean the plug/socket surface regularly and apply anti-corrosion grease

12

9 Core Explosion Proof Plug/Socket 16YT-9J/16GZ-9K

Shell: Die-cast aluminum alloy with anti-corrosion treatment; Contacts: Copper alloy with silver plating; Explosion-proof grade Exd II CT6; High contact reliability

1. Contact poor due to dust accumulation in the socket; 2. Damage caused by improper plugging and unplugging (forced insertion); 3. Corrosion caused by humid and corrosive environments

1. Clean the socket before plugging in; 2. Plug in and unplug smoothly, avoiding forced insertion; 3. Use a dust cover when the plug/socket is not in use

13

Explosion-proof Knob Switch

Shell: Die-cast aluminum alloy with explosion-proof treatment; Knob: Engineering plastic (PA66); Explosion-proof grade Exd II CT6; High mechanical strength

1. Switch failure due to internal contact wear; 2. Explosion-proof seal damage caused by frequent operation; 3. Damage caused by external impact

1. Operate the switch gently to reduce contact wear; 2. Check the explosion-proof seal regularly and replace if damaged; 3. Install a protective guard around the switch

14

Explosion-proof Knob Switch

Shell: Die-cast aluminum alloy with explosion-proof treatment; Knob: Engineering plastic (PA66); Explosion-proof grade Exd II CT6; Good waterproof and dustproof performance

1. Switch jamming due to dust accumulation; 2. Contact corrosion caused by humid environment; 3. Mechanical wear due to long-term operation

1. Clean the switch surface and internal mechanism regularly; 2. Ensure the switch is installed in a dry area; 3. Lubricate the internal mechanical structure every 1500 working hours

15

Explosion-proof Indicating Lamp DC24V

Shell: Die-cast aluminum alloy with explosion-proof treatment; Lamp bead: LED (lifespan ≥50,000 hours); Explosion-proof grade Exd II CT6; Low power consumption

1. Lamp bead burnout due to voltage fluctuation; 2. Explosion-proof seal damage caused by vibration; 3. Light attenuation due to dust accumulation on the lampshade

1. Install a voltage stabilizer in the circuit; 2. Fix the indicator lamp firmly to reduce vibration; 3. Clean the lampshade regularly with a soft cloth

16

Fuse Seat RT-18

Shell: Engineering plastic (PA66) with flame retardant; Contacts: Copper alloy; High temperature resistance (up to 120℃)

1. Contact poor due to loose fuse installation; 2. Seat damage caused by fuse burnout (arc ignition); 3. Corrosion caused by humid environment

1. Install the fuse firmly in the seat; 2. Select a fuse with the correct rated current to avoid overload burnout; 3. Apply anti-rust treatment to the contacts in humid environments

17

Fuse Core 32A

Fuse element: Copper-tin alloy; Housing: Ceramic (high temperature resistance); Complying with GB/T 9364.1-2015 standard

1. Fuse burnout due to overload current; 2. Damage caused by voltage surge; 3. Deterioration due to high ambient temperature

1. Ensure the circuit current does not exceed the fuse's rated current; 2. Install a surge protector to prevent voltage surges; 3. Install the fuse in a low-temperature environment (ambient temperature ≤40℃)

18

Fuse 10A

Fuse element: Lead-tin alloy; Housing: Glass (transparent for easy observation); Complying with GB/T 9364.1-2015 standard

1. Fuse burnout due to short circuit in the circuit; 2. Damage caused by mechanical vibration; 3. Deterioration due to humid environment

1. Check the circuit for short circuits regularly; 2. Install the fuse in a vibration-damping holder; 3. Store spare fuses in a dry environment

19

Fuse 6A

Fuse element: Lead-tin alloy; Housing: Glass; Complying with GB/T 9364.1-2015 standard; High breaking speed

1. Fuse burnout due to incorrect rated current selection; 2. Damage caused by contact with conductive substances; 3. Deterioration due to long-term storage

1. Select a fuse with the correct rated current according to the circuit requirements; 2. Keep the fuse away from conductive substances (e.g., metal fragments); 3. Use spare fuses within 1 year of purchase

20

Fuse 3A

Fuse element: Lead-tin alloy; Housing: Glass; Complying with GB/T 9364.1-2015 standard; Suitable for low-current circuits

1. Fuse burnout due to circuit leakage; 2. Damage caused by improper installation (excessive force); 3. Deterioration due to high temperature

1. Check the circuit for leakage regularly; 2. Install the fuse gently to avoid breaking the glass housing; 3. Install the fuse away from high-temperature components

21

Control Transformer JBK5-400/380/220V

Iron core: Silicon steel sheet (high magnetic permeability); Winding: Copper wire with insulation coating; Housing: Steel plate with electrostatic spraying; High efficiency (≥95%) and low noise

1. Transformer overheating due to overload operation; 2. Winding insulation damage caused by moisture; 3. Core vibration noise increase due to loose fixing

1. Ensure the load does not exceed the transformer's rated power; 2. Keep the transformer in a dry environment and check the insulation resistance regularly; 3. Tighten the core fixing bolts every 2000 working hours

How to confirm the compatibility of these spares with my Baoji Engineering Hydraulic HYZ-800B HPU?

The key steps are: 1. Confirm the exact model and serial number of your HYZ-800B HPU (available on the HPU's nameplate); 2. Match the spare part model with the Baoji Engineering Hydraulic HYZ-800B HPU parts manual (each spare part model is uniquely corresponding to the HPU's components); 3. Consult professional suppliers with the HPU's model and serial number to ensure the spares are 100% compatible. Using non-matching spares may cause component damage and affect the HPU's normal operation.

What are the key points for the daily maintenance of HYZ-800B HPU spares to ensure the HPU's stable operation?

1. Filtration system maintenance: Replace filter elements regularly according to the maintenance schedule, monitor the filter pressure difference in real time, and clean the filter housing regularly. 2. Sealing system maintenance: Check O-rings and gaskets for aging, damage, and leakage regularly, and replace them in time; apply lubricating oil to the sealing surfaces during installation. 3. Electrical system maintenance: Keep the electrical control cabinet clean and dry, check the tightness of electrical terminals regularly, and test the performance of electrical components (breakers, contactors, etc.) periodically. 4. Regular inspection: Conduct a comprehensive inspection of the HPU every 500 working hours, including hydraulic oil quality, component wear, and electrical connection status, to detect and solve potential faults early.

What are the differences between O-rings complying with GB1235-76 and GB3452.1-92 standards, and how to select them correctly?

The main differences are: 1. Standard release time: GB1235-76 is an earlier standard, while GB3452.1-92 is an updated standard with more stringent dimensional accuracy requirements. 2. Material applicability: O-rings complying with GB1235-76 are mostly nitrile rubber (NBR) suitable for general oil-resistant scenarios, while those complying with GB3452.1-92 include fluororubber (FKM) suitable for high-temperature and strong chemical corrosion scenarios. Selection method: 1. According to the working medium: Select NBR O-rings (GB1235-76) for general hydraulic oil; select FKM O-rings (GB3452.1-92) for high-temperature or chemical corrosion environments. 2. According to dimensional accuracy requirements: Select GB3452.1-92 O-rings for high-precision sealing scenarios; GB1235-76 O-rings can be selected for general scenarios.