HOWO Clutch Booster WG9725230041/S

WG9725230041/S

Clutch booster (air-over-hydraulic clutch servo) WG9725230041/S, Φ102 mm bore, nameplate by Chongqing Jinli. Fits SINOTRUK HOWO A7, Jin Prince (Kingjin), HOKA and 70-ton mining trucks. Heavy clutch pedal and clutch drag are typical signs it needs replacement. In stock, bulk orders welcome.

✓ OEM number matched confirm the part number before ordering ✓ Photographed the photos are the actual part we ship ✓ MOQ 1 piece · neutral packing ✓ Shipping worldwide from Jinan, 7–15 days

Request a Quote Bulk pricing available →

HOWO Clutch Booster WG9725230041/S

The clutch booster WG9725230041/S is the air-over-hydraulic servo unit (clutch assist cylinder, group GKC105) mounted on the front housing of the gearbox on SINOTRUK HOWO trucks. Compressed air assists the hydraulic pressure from the clutch master cylinder, so a heavy spring clutch can be released with a light pedal. The oval nameplate on our stock reads part number WG9725230041/S, made by Chongqing Jinli Automobile Parts Co., Ltd. — a major OEM supplier of clutch servos for Sinotruk and Shacman.

Cross References

WG9725230041/S – marking on the nameplate of our stock (photo in gallery)
WG9725230041 – base number, also listed as WG9725230041/J variant
GKC105 – clutch booster group code; related number WG9525230061
1608 – clutch control system group (Φ102 mm bore, Φ25 push rod)

Applications

SINOTRUK HOWO A7 tractor and dump trucks
SINOTRUK Jin Prince (Jin Wangzi) and HOKA trucks
HOWO 70-ton mining trucks (70 mine overlord)
Other Sinotruk models using the GKC105 clutch servo group

WG9725230041 comes in suffix variants (/S, /J, plain) that differ in fittings and push rod. Always match the full number with suffix on your old nameplate before ordering.

Key Features

Φ102 mm steel air cylinder with corrosion-protected finish
Grey aluminium hydraulic control section with bleed port
Rubber bellows dust boot protecting the brass push rod
OEM nameplate: Chongqing Jinli, dated 2026-09 (new production)
Direct replacement, no modification required

Signs of Wear / When to Replace

Clutch pedal becomes very heavy or stiff through the stroke
Clutch drags or will not release fully, gears grind when engaging
Hissing air leak from the servo, or hydraulic fluid weeping from the control valve
Pedal returns slowly or sticks near the floor

Genuine and OEM quality available. Bulk orders welcome. Send us the part number or a photo of your old booster and we will confirm fitment and quote within one working day.

Specifications

Part Number	WG9725230041/S
Product	Clutch Booster
Fits	Sinotruk HOWO trucks
Condition	New
Quality	Genuine and OEM options available

Frequently Asked Questions

What does part WG9725230041/S fit?

Clutch booster (air-over-hydraulic clutch servo) WG9725230041/S, Φ102 mm bore, nameplate by Chongqing Jinli. Fits SINOTRUK HOWO A7, Jin Prince (Kingjin), HOKA and 70-ton mining trucks. Heavy clutch pedal and clutch dr... It is supplied for Sinotruk HOWO heavy trucks. Send your VIN or a photo of the nameplate on the old part and we will confirm fitment before you order.

Is WG9725230041/S genuine, OEM or aftermarket?

Genuine, OEM and high-quality aftermarket options are available depending on stock. Tell us which grade and budget you need and we will quote both so you can compare.

What is the minimum order and lead time for WG9725230041/S?

Minimum order is 1 piece for most items. Stock items are dispatched within 2-3 working days; if the part has to be sourced we confirm the exact lead time in the quotation, usually 5-10 working days.

How do you ship WG9725230041/S?

Air express (DHL / FedEx / UPS) for urgent orders, and sea or rail freight for bulk orders. We send photos of the actual part and the packing before shipment, then share the tracking number.