Malabar 95P10AR - Trouble Shooting

Model: 95P10AR
Two Stage Hydraulic Aviation Floating Auto-Retract Axle Jack
S/N 263 and Up
12/2018 | Rev. 01 Page | 7
6.0 TROUBLE SHOOTING
TROUBLE
PROBABLE CAUSE
REMEDY
Jack will not raise
Release valve open
(Oil passing back into reservoir)
Close valve firmly
Intake valve open.
(Oil passing back into reservoir)
Pump rapidly to flush dirt off
Discharge valve open
(Oil passing back into pump chamber)
Pump rapidly to flush dirt off
Sticking intake valve
Remove pump from jack base. Unscrew
valve block. Clean or replace valve
Clogged screen
Remove and clean
Lack of oil. Air under plunger
Refill. Check for leaks. Bleed air out by
opening release valve. Pump rapidly a
few times and close release valve
Jack will not raise to full height
Lack of oil
Refill, check for leaks
Sticking intake valve
Remove pump from jack base. Unscrew
valve block. Clean or replace ball valves.
Re-tighten or repair
Jack will not raise capacity load
High pressure leaks
(At pump or release valve)
Reseat valve
Leaky release valve
Reseat valve and clean valve block
Jack raises and falls during each
stroke
Leaky discharge valve
Tighten or replace ball valve or packing
Jack will not hold up load
Leaky release valve
Reseat valve
Defective "O" ring and back up ring
Remove plunger and replace "O" ring and
back up ring
Jack will not lower the load
Damaged release valve
Remove and replace parts as needed
Bent plunger
Replace
Jack will not close completely
Air under plunger
Bleed air out. Open release valve and
pump rapidly several times. Close valve
Handle stroke only partly
effective
Air in pump chamber
Open release valve and pump rapidly
several times. Close valve
Sticking intake valve
Remove pump and clean valve block
Clogged screen
Remove and clean
Handle raises without effort
Leaky intake valve
Remove pump and clean valve block
Handle snaps back
Sticking intake valve
Open release valve. Pump rapidly
several times. Close valve
Clogged screen
Remove and clean