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Info - Release of Revised Park Brake Pump/Reservoir Assembly

Subject:Release of Revised Park Brake Pump/Reservoir Assembly

Models:1999-2000 Chevrolet and GMC C6-7 Series Conventional Medium Duty Models
1997-2000 Chevrolet and GMC F6-7 T Series Medium Duty Tilt Models
With Power Operated Parking Brake (RPO J71)
Built Prior to October 7, 1999 and the following VIN Breakpoints:



Division

VIN Breakpoint

Chevrolet

YJ506784

GMC

YJ506765

A revised park brake pump assembly and reservoir kit have been released and are available as a service replacement for parking brake systems (RPO J71) that may become contaminated by water or moisture.

Park Brake Pump w/Reservoir- Former F Model (Typical)


Object Number: 657816  Size: MH

Park Brake Pump Reservoir -- Current and Former


Object Number: 695034  Size: SF

This park brake pump assembly incorporates a four-point reservoir mount. This new design features a four fastener reservoir attachment around the O-ring seal (1). This new design is different from the previous single-point reservoir attachment (2). The seal area of the reservoir has also been redesigned. These changes should provide improved sealing in the reservoir attachment area.

C-Model Conventional Trucks can be upgraded by just replacing the reservoir. F Model tilt trucks will require a complete pump/reservoir assembly upgrade. The pump O-ring seal, P/N 15156687, is also available separately as a service part. Refer to the parts information listed below.

Parts Information

Part Number

Description

15743820

Pump Asm., Park Brk (w/motor)

(C Models)

12478148

Reservoir Kit, Park Brk Pump (includes reservoir, cap, fasteners, and O-ring seal)

(C Models)

15743821

Pump Asm., Park Brk (w/motor)

(F Model Tilt)

12478149

Reservoir Kit, Prk Brk Pump (includes reservoir, cap, fasteners, and O-ring)

(F Model Tilt)

15156687

Seal, Park Brk Pump (O-ring)

Parts are currently available from GMSPO.