Carver Mini C Operation, Installation, And Maintenance Manual page 51

RELEASE VALVE
If the pump fails to lift or hold a load, the release valve may be dirty. From back of pump remove release valve plug,
release ball spring and release ball. From front remove release lever pin, release lever, and release plunger. Clean
release valve chamber and inspect ball seat. If necessary, reseat release ball by tapping it lightly on the ball seat, using
the 3/8" ball seating tool (CP13-43). Clean plunger and inspect plunger packing. Replace if necessary. To reassemble,
insert ball, ball spring, and release valve plug. Dip release plunger packing in hydraulic oil and carefully insert into
plunger chamber. Replace release lever and lever pin.
REPAIR PARTS KIT
REPAIR PARTS KIT
329051
329048
SECTION B-B
RELEASE VALVE
OVERLOAD VALVE
If the pump fails to lift or hold a load after the release valve and pump valves have been checked, the overload valve
may be dirty. To clean valve, remove valve plug and valve plug seal. Using a screwdriver, remove the overload valve
screw. Tip pump forward to remove valve spring, valve plunger and steel ball. Clean valve, remove valve spring, valve
plunger and steel ball. Clean and inspect valve hole. If the ball seat is marred, re-seat same by lightly tapping ball on
seat, using tool (CP13-45). Remove ball to prevent sticking. Reassemble ball, plunger, spring and valve screw.
Connect a pressure gauge to the pressure outlet. Stroke pump to obtain maximum desired pressure. Turn valve screw
clockwise to increase pressure reading and counter-clockwise to reduce maximum reading. After valve is set properly,
replace valve seal and valve plug.
REPAIR PARTS KIT
329046
NEW STYLE
OLD STYLE
VALVE PLUG
VALVE PLUG
SECTION C-C
OVERLOAD VALVE
11-9