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Parker Hannifin Corporation
Helac/Cylinder Division
Enumclaw, Washington USA
www.helac.com
PowerTilt Tilting Coupler
PT-4.5 Service & Repair Manual
HY34-1370
Post Assembly
Greasing and Testing
If the equipment is available, the PowerTilt
should be tested on a hydraulic test bench. The
breakaway pressure — the pressure at which the
shaft begins to rotate — should be approximately
28 bar. Cycle the actuator at least 25 times at 210
bar pressure.
Testing for internal leakage
Connect hydraulic lines to the housing ports.
Bleed all air from the PowerTilt. Rotate the shaft
to the end of rotation at 210 bar and maintain
pressure. Remove the hydraulic line from the
non-pressurized side. Continuous oil flow from
the open housing port indicates internal leakage
across the piston or cross port relief valve.
Replace the line and rotate the shaft to the end
of rotation in the opposite direction. Repeat the
test procedure outlined above for the other port. If
there is an internal leak, disassemble, inspect and
repair.
Greasing
Testing
After the actuator is assembled but before it is
put into service, the thrust washer area must be
packed with Lithium grease.
1.
There are two grease ports located on both
the shaft flange and the end cap. They are
plugged with cap screws (113) or set screws.
Remove the grease port screws from the shaft
flange and end cap. (See exploded view on
page 4)
If a hydraulic test bench is not
available, the actuator can be
rotated by hand, open the pressure
ports and use a pry bar with cap
screws inserted into the shaft
flange to turn the shaft in the
desired direction.
2.
Insert the tip of a grease gun into one port
and apply grease to the shaft flange. Continue
applying until grease flows from the opposite
port. Cycle the actuator five times and apply
grease again. Repeat this process on the end
cap. Insert the cap screws into the grease
ports and tighten to 25 in-lbs. (2.8 Nm).
NOTICE
