JQH Pneumatic Winch Spare Parts Catalog (JQH-5×48 Series, Serial No.44-90)

1

JQH-5×48-0034

Balance weight

Cast iron + anti-rust coating

1. Corrosion from humid environments; 2. Impact damage during installation

1. Apply anti-rust paint annually; 2. Install with shock-absorbing pads to avoid impact

2

JQH-5×48-0038

Double-gear

Alloy steel 20CrMnTi (gear steel)

1. Tooth pitting from contaminated oil; 2. Wear from misalignment

1. Use ISO VG 46 gear oil with anti-wear additives; 2. Align with shafts per GB/T 10095.1

3

JQH-5×48-0039

Small shaft

Alloy steel 42CrMo

1. Fatigue cracking at stress points; 2. Wear at bearing contact

1. Inspect via magnetic particle testing every 6 months; 2. Lubricate with lithium grease monthly

4

JQH-5×48-0045

Clutch spring

65Mn spring steel

1. Fatigue deformation from frequent compression; 2. Corrosion-induced brittle fracture

1. Limit compression cycles to 1500/month; 2. Store in dry environment when spare

5

JQH-5×48-0100

Brake assembly

Alloy steel + friction lining

1. Friction lining wear from frequent braking; 2. Spring fatigue affecting braking force

1. Replace lining when wear exceeds 2mm; 2. Test braking force monthly per GB/T 10055

6

JQH-5×48-0059e

Spring cap

Carbon steel Q355B + quenching

1. Wear from spring compression; 2. Deformation from impact

1. Ensure proper fit with spring; 2. Avoid over-tightening during assembly

7

JQH-5×48-0062e

Spring

65Mn spring steel

1. Thermal aging in high-temperature environments; 2. Over-compression damage

1. Operate within -20℃ to 120℃; 2. Do not exceed maximum compression limit

8

JQH-5×48-0053d

Brake transition joints

Stainless steel 304

1. Leakage from seal wear; 2. Corrosion from harsh media

1. Replace seals every 6 months; 2. Apply anti-corrosion grease to threads

1

JQH-5×48-0200

Piston and connecting rod assembly

-

Aluminum alloy + NBR seal + alloy steel rod

1. Seal wear from piston movement; 2. Connecting rod bending from lateral force

1. Lubricate with pneumatic oil monthly; 2. Ensure piston concentricity

2

GB/T4661-2000

Roller

6×6

GCr15 bearing steel

1. Abrasive wear from foreign particles; 2. Fatigue from high-frequency rotation

1. Install dust covers to prevent contamination; 2. Replace if surface wear exceeds 0.1mm

3

JQH-5×48-0001

Cylinder cover

-

Aluminum alloy + anti-corrosion coating

1. Corrosion from moisture in compressed air; 2. Damage from over-torque

1. Install air dryer in the pipeline; 2. Torque fasteners to 25±3 N·m

4

SDA40×40-B

Air cylinder

-

Aluminum alloy + stainless steel piston rod

1. Piston rod corrosion; 2. Seal leakage from pressure fluctuations

1. Apply anti-rust oil to the rod weekly; 2. Stabilize air pressure at 0.4-0.6MPa

1

83 4A210-6

Two five-way valve

-

Brass + plastic valve core + NBR seal

1. Seal wear from frequent switching; 2. Clogging from air impurities

1. Install a 5μm air filter; 2. Clean valve core every 3 months

2

85 12×1.25C R1/8

Two five-way valve

R1/8

Brass + NBR seal

1. Thread corrosion; 2. Seal aging from thermal exposure

1. Apply thread sealant during installation; 2. Avoid direct sunlight

3

90 3A220-6

Two three-way valve

-

Brass + plastic components

1. Plastic part damage from impact; 2. Internal clogging from oil residues

1. Install protective cover; 2. Flush with clean air monthly

4

86 J Type

Hose

6×500

Nitrile rubber (NBR) + steel wire reinforcement

1. Abrasion from friction; 2. Aging from oil exposure

1. Use hose protectors at friction points; 2. Replace every 12 months

5

87/89 J Type

Hose

6×410

Nitrile rubber (NBR) + steel wire reinforcement

1. Kinking damage; 2. Pressure fatigue

1. Avoid sharp bends (minimum bend radius 50mm); 2. Do not exceed 1.0MPa working pressure

6

88 P Type

Hose

6×280

Nitrile rubber (NBR) + steel wire reinforcement

1. Damage from external impact; 2. Seal leakage at fittings

1. Secure with clips to avoid movement; 2. Inspect fittings for tightness weekly

7

80 JZY-Z6

Card sets through the terminal fittings

-

Brass + stainless steel clamp

1. Loosening from vibration; 2. Corrosion of clamp

1. Retorque clamps monthly; 2. Apply anti-rust oil to clamps

8

74 R1/8

Hollow bolt

R1/8

Brass + zinc plating

1. Thread wear from repeated assembly; 2. Leakage from seal damage

1. Use thread protectors when disconnected; 2. Replace sealing washers after disassembly

1

JQH-5×48-0035

Retainer ring 1

6

-

Stainless steel 304

1. Deformation from improper installation; 2. Corrosion

1. Use specialized pliers for installation; 2. Apply anti-rust oil

2

JQH-5×48-0036

Oil drain screw plug

-

-

Carbon steel 45# + zinc plating

1. Thread wear from repeated removal; 2. Leakage from washer damage

1. Torque to 30±3 N·m; 2. Replace sealing washer every oil change

2

JB/ZQ4454-86

Sealing washer for screw plugs

16×20

JB/ZQ4454-86

Nitrile rubber (NBR 70)

1. Compression set; 2. Swelling from incompatible oil

1. Replace after each removal; 2. Use NBR-compatible oil

3

JQH-5×48-0040

Retainer ring 2

-

-

65Mn spring steel

1. Fatigue from vibration; 2. Wear at groove contact

1. Replace if deformation exceeds 1mm; 2. Inspect groove monthly

4

GB/T893.1-2000

Elastic retainer ring for shafts

40

GB/T893.1-2000

65Mn spring steel

1. Tensile damage during installation; 2. Corrosion

1. Do not over-expand during installation; 2. Apply anti-rust oil

5

JQH-5×48-0046

Split cap

-

-

Alloy steel 35CrMo

1. Wear from shaft rotation; 2. Deformation from over-torque

1. Lubricate with anti-seize paste; 2. Torque evenly to 40±5 N·m

6

GB/T70-2000

Screw

M12×25

GB/T70-2000

Carbon steel 45# + zinc plating

1. Thread galling; 2. Corrosion from moisture

1. Apply anti-galling paste; 2. Retorque monthly

7

GB/T93-2000

Washer

12

GB/T93-2000

Carbon steel Q235 + zinc plating

1. Deformation from over-torque; 2. Corrosion

1. Do not exceed torque limit; 2. Replace if rusted

8

JQH-5×48-0002

Pad 1

-

-

Rubber + steel core

1. Compression set; 2. Tear from vibration

1. Control compression ratio at 15-20%; 2. Replace every 6 months

9

GB/T70-2000

Screw

M10×25

GB/T70-2000

Carbon steel 45# + zinc plating

1. Loosening from vibration; 2. Thread wear

1. Use lock washers; 2. Retorque every 2 months

10

GB/T93-2000

Washer

10

GB/T93-2000

Carbon steel Q235 + zinc plating

1. Corrosion; 2. Flattening from load

1. Store in dry environment; 2. Replace if flattened

11

GB/T70-2000

Screw

M10×40

GB/T70-2000

Carbon steel 45# + zinc plating

1. Bending from lateral force; 2. Thread damage

1. Avoid eccentric load; 2. Use proper wrench size

12

JQH-5×48-0048

Exhaust cover

-

-

Aluminum alloy

1. Clogging from dust; 2. Corrosion from exhaust moisture

1. Clean air vent weekly; 2. Apply anti-corrosion spray

13

GB/T70-2000

Screw

M10×30

GB/T70-2000

Carbon steel 45# + zinc plating

1. Over-torque damage; 2. Corrosion

1. Torque to 20±2 N·m; 2. Apply anti-rust oil

14

JQH-5×48-0044

Screw plug

-

-

Carbon steel 45# + zinc plating

1. Leakage from seal wear; 2. Thread corrosion

1. Replace seals every 6 months; 2. Apply thread sealant

15

JQH-5×48-0043

Spring

-

-

65Mn spring steel

1. Fatigue from repeated compression; 2. Rust

1. Limit compression cycles; 2. Store in dry place

16

JQH-5×48-0042

Pin

-

-

Stainless steel 304

1. Wear from rotation; 2. Corrosion

1. Lubricate monthly; 2. Inspect for wear every 3 months

17

JQH-5×48-0050

Baffle

-

-

Carbon steel Q235 + anti-rust paint

1. Impact damage; 2. Paint peeling and corrosion

1. Install away from high-impact areas; 2. Touch up paint on scratches

18

GB/T5783-2000

Bolt

M10×25

GB/T5783-2000

Carbon steel 45# + zinc plating

1. Loosening from vibration; 2. Thread wear

1. Use nylon insert lock nuts; 2. Retorque monthly

19

GB/T5783-2000

Bolt

M4×45

GB/T5783-2000

Carbon steel 45# + zinc plating

1. Bending from over-torque; 2. Corrosion

1. Torque to 5±1 N·m; 2. Apply anti-rust oil

20

JQH-5×48-0058d

Valve fixing plate

-

-

Carbon steel Q355B + epoxy coating

1. Bolt hole wear; 2. Corrosion from moisture

1. Use washers to distribute load; 2. Install on dry surface

1

JQH-5×48-0041

Nameplate

-

-

Stainless steel + engraving

1. Wear of engraved marks; 2. Corrosion

1. Apply protective film; 2. Clean with neutral detergent

2

GB/T827-2000

Rivet

2×4

GB/T827-2000

Aluminum alloy

1. Deformation during installation; 2. Corrosion

1. Use proper riveting tool; 2. Avoid exposure to saltwater

3

JQH-5×48-0300

Oil metering pin

-

-

Stainless steel 304

1. Clogging from oil impurities; 2. Wear at adjustment thread

1. Clean monthly with diesel; 2. Adjust smoothly to avoid thread damage

4

JQH-5×48-0047

Nameplate (For gas control)

-

-

Stainless steel + engraving

1. Fading from chemical exposure; 2. Impact damage

1. Shield from corrosive chemicals; 2. Install protective cover

5

JQH-5×48-0062e

Bearer arch

-

-

Alloy steel 35CrMo

1. Fatigue from load; 2. Corrosion

1. Inspect for cracks quarterly; 2. Apply anti-corrosion paint

How often should pneumatic hoses be replaced?

Replace NBR steel-reinforced hoses every 12 months, or sooner if abrasion, kinking, or cracks are found. For offshore or high-abrasion environments, shorten the interval to 8 months.

What is the correct torque for M10 screws and bolts?

Torque M10×25/30/40 screws/bolts to 20-25 N·m for aluminum components and 25-30 N·m for steel components, complying with GB/T 16823.3 torque guidelines. Use a torque wrench for precision.

How to maintain clutch and brake springs?

Inspect springs monthly for deformation or rust. Lubricate with anti-rust oil, avoid over-compression, and replace every 24 months or if fatigue is detected. Store spare springs in a dry, cool environment to prevent aging.