JBM 50812 Guide D'utilisation page 14

c) Tilt the pump to allow old hydraulic oil to completely drain out of the unit and dispose of it accor-
ding to local regulations.
d) Completely fill the unit with a high quality hydraulic oil (not included) until the oil starts to flow
out through the fill hole.
e) Reinstall the oil fill screw.
f) Clean with a clean cloth using a detergent or mild solvent.
g) Replace the pump on the frame post (see step 5 - assembly instructions).
TROUBLE SHOOTING
TO PREVENT SERIOUS INJURY
Be cautious when encountering operating difficulties in the press.
Resolve all problems before operating the tool. If the solutions presented in the troubles-
hooting guide are not effective, have the jack inspected and repaired by a qualified technician.
After the ram and pump are repaired: Test without any load by raising and lowering the tool com-
pletely, checking for actual operation, BEFORE USING THE PUMP AGAIN.
Problem
Ram does not operate
when handle is pum-
ped
Ram will not hold load
Ram reluctant to lower
when load removed
Ram will not extend to
full range of stroke
Ram tries to tilt to one
side
Possible cause
Release valve not tightly
closed
Air in the pump
The steel ball is immersed
inside for too long
Release valve not tightly
closed
Malfunction in pump such
as dirt inside valve mecha-
nism
Oil reservoir overfilled
Piston binding
Overextend the ram
Low oil level
Incorrect of connection or
unbalance of the footing
· 14 ·
Solution
Firmly close the release valve
Please follow the steps:
1. Open the release valve by turning it
counter-clockwise, pump up the handle
10-15 times.
2. Close the release valve by turning
it clockwise, pump up the handle 5-10
times.
3. Repeat 3 times the steps 1 and 2
Firmly close the release valve
Please follow the steps:
1. Open the release valve by turning it
counter-clockwise, pump up the handle
10-15 times.
2. Close the release valve by turning it
clockwise, pump up the handle 10-15
times
3. Repeat the step 1 and 2
Drain oil to correct level
Clean and lubricate moving parts
Replace ram
Add hydraulic oil to the reservoir
Stop work and re-position ram and base,
ensuring it is well supported and as
close to perpendicular to the repair as
possible
REF. 50812