K 3500 Truck 4WD V8-379 6.2L DSL (1985)
Hydraulic Fluid Accumulator: Service and Repair
Fig. 2 Removing Accumulator
Do not attempt to repair or apply heat to the accumulator. Before discarding an inoperative accumulator, drill a 1/16 in. diameter hole through the end
of the accumulator pan. Do not drill through the piston end. Always wear safety glasses when performing service on the accumulator.
1.
Push pedal rod several times to ensure accumulator is depleted.
2.
Secure brake booster mounting bracket in a vise with pedal rod facing downward.
3.
Place tool No. J-26889 over master cylinder stud and install retaining nut.
4.
Using a C-clamp, depress accumulator can, then insert a punch into hole in housing to unseat retaining ring, Fig. 5. Remove ring from housing
using a small screwdriver. If can cannot easily be depressed approximately .10 in., the accumulator is still charged. This indicates an
internal problem with the accumulator valves and the brake booster must be disassembled.
5.
Slowly back off C-clamp until tension is relieved, then remove C-clamp, retaining cap and accumulator.
6.
Reverse procedure to assemble. Lubricate accumulator can seal with power steering fluid. Ensure accumulator can retaining ring is completely
seated in housing groove.
