Parker Helac PowerTilt Series, Руководство по обслуживанию и ремонту

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PowerTilt Tilting Coupler
PowerTilt Series Service & Repair Manual
HY34-1410
55
Parker Hannifin Corporation
Helac/Cylinder Division
Enumclaw, Washington USA www.parker.com/helac
Testing for Internal Leakage
1.
Connect a 350 bar test gauge into the
hydraulic line to Port P1. Pressurize until
the shaft reaches the end of rotation and
bottoms out externally, e.g. the shaft bracket
or torque foot contacts the housing or
mounting bracket.
NOTICE
If the shaft is not completely
bottomed out, hydraulic fluid will
exhaust from Port P2 at a high
velocity.
2. Remove and cap the hydraulic line to Port
P2. Pressurize Port P1 to 175 bar. Check
for leakage at Port P2 and from around the
main shaft and end cap seals. Leaks indicate
improperly installed parts.
3. Reconnect the hydraulic line to Port P2 and
pressurize as in Step 1 above.
4.
Check for leaks at Port P1 and around the
main shaft and end cap seals as in Step 2
above.
Testing the Cross Port Relief Valve
The integral cross port relief valve vents hydraulic
oil around the internal piston assembly of the
PowerTilt at approximately 210 to 238 bar.
To test the valve:
1. Connect a 350 bar test gauge into the line to
Port P1. Pressurize until the shaft reaches the
end of rotation and bottoms out externally,
e.g. the shaft bracket or torque foot contacts
the housing or mounting bracket.
2. Relieve pressure to P2 and disconnect the
hydraulic hose and cap it.
3.
Install a temporary hydraulic hose to P2 with
the end of the hose vented to an appropriate
container.
NOTICE
The cross port relief valve is set
at the factory and cannot be
adjusted.
4. Slowly pressurize Port P1 noting the pressure
at which oil flows from P2. The relief should
vent at approximately 210 to 238 bar.
5. Test at Port P2 using the same procedure.
6.
If test pressure does not meet specification,
the valve must be replaced. If piston seal
leakage is suspected, relief port test plugs
are available from the factory.
Post Assembly
Testing and Greasing