11
12/21 REV 4/22
GB808 POWERUNIT
FILLING AND BLEEDING
WARNING:
Use extreme caution when cycling tool with bleed screw removed. Pressurized oil will spray out of the bleed port.
Severe personal injury may occur.
Images may not reflect actual tool
Fill oil reservoir approx. 3/4 full
1.
Disconnect air supply from the powerunit.
2.
Fill oil reservoir approximately 3/4 full. Use hydraulic oil (AW
-
32® or equivalent).
3.
Remove bleed screw and stat
-
o
-
seal from head cylinder/handle assembly. (See handle/tool picture below for reference and see
tool manual for step by step bleeding procedure).
4.
Provide a suitable container to bleed oil into.
5.
Connect air supply to powerunit. Reduce air pressure to 50 psi. (3.45 bar) during bleeding procedure.
6.
Point the bleed port towards a container, push actuator lever down and hold. (Block bleed port using a small piece of rubber
material before releasing actuator lever to prevent ingestion of air into powerunit).
7.
Repeat until clear oil streams from port. Check reservoir after each cycle and refill when required. Do NOT drain reservoir below
minimum.
8.
On last cycle of oil, hold actuator lever. Install bleed screw and stat
-
o
-
seal prior to releasing the actuator lever and torque to
35
-
40 inch lbs. (3.95
-
4.52 Nm). This may require two people. (Do NOT over
-
tighten)
9.
See tool manual for the correct stroke requirements by checking the piston in the forward and rearward positions.
If stroke does
not reach manual recommendations,
repeat steps 1
-
8 until stroke met.
HANDLE/TOOL
BOOSTER
Bleed port
Summary of Contents for GB808
Page 13: ...13 12 21 REV 4 22 GB808 POWERUNIT OVERHAUL BOOSTER ASSEMBLY ...
Page 16: ...16 12 21 REV 4 22 GB808 POWERUNIT GB808 POWER UNIT ...
Page 17: ...17 12 21 REV 4 22 GB808 POWERUNIT GB808 POWER UNIT FRAME ASSEMBLY ...
Page 19: ...19 12 21 REV 4 22 GB808 POWERUNIT This page intentionally left blank ...
