Cherry Aerospace G84-LS, Original Instructions Manual

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TOOL CARE
This tool has been designed for optimum service with minimum care.
In order to extend the life of the tool, please follow the simple instructions given below:

Make sure the system is filled properly with fluid and is free of air (see fill and bleed instructions)

Do not use any substitutes for DEXRON III ATF or spare components

Use only clean air; dirt and moisture will cause damage to the pneumatic system.

Inspect for air and fluid leaks routinely. Minor fluid loss over time is normal, but increased fluid or air loss indicates seal damage. Make
sure that all fittings are properly tightened and secured.

Do not operate with hoses unprotected or with a damaged hose wrap.

Perform regular maintenance.
TROUBLESHOOTING GUIDE
PROBLEM
POSSIBLE REASONS / SOLUTIONS
- No air supply is connected:
Connect to a clean, filtered air source at 90 to 110 psi (6,2 to 7,6 bar).
- Faulty trigger: Remove and replace trigger assembly.
Piston does not move after depressing Trigger
- Broken power piston: Service the Handle Subassembly per page 7.
Short stroke or low pull force
- Significant fluid loss: Bleed the system per page 5.
If performance doesn’t improve, or excessive leakage continues, see below.
- Leaks around the plugs (69) or fittings indicate that they are not tightened to seal
properly: Tighten until no more leaks are observed.
- Leaks at the front or back of head cylinder (70) indicate worn or damaged
seals:
Head Cylinder Fluid leakage
Service head cylinder per page 7.
- Broken or dislodged spring (49).
Air leakage at the valve
- Worn or damaged valve spool seals: Disassemble and service air valve per Air
Sub-Assembly Overhaul Instructions.
- Piston or seal damage : Service head cylinder per page 7.
- Oil bypassing due to power piston (25) displacement Of its seat in subassembly
(84): Service Handle Subassembly per page 7.
- Clogged muffler (55) or air filter (51) : Clean thoroughly with solvent and back-
blow with compressed air.
Head piston (64) is slow or seizes
- Lock ring (item 58) is not secured due to loose cap screw (57): Tighten lock-ring,
and then secure it by tightening cap screw.
Use Loctite
®
removable thread locker to secure it.
- Pressure relief valve (85) malfunction: Remove valve then O-ring (42) from the
manifold (35). Clean and dry thoroughly components. Replace O-Ring (use Parker
®
silicone O-ring lube or equivalent). Re-assemble valve; make sure the O-ring (42) is
seated concentrically inside of the valve cavity before installing the Ball-seat (41) into
the manifold (35).
Head Piston (64) does not return fully forward
even after system bleeding
- Compression spring (31) is damaged or broken: Remove handle manifold (35)
and replace the damaged spring. Re-assemble, fill and bleed per page 5.
Cherry
®
is well known for the quality of our tools and our outstanding customer support.
If the tool does not perform at the expected performance please contact our representatives.
LOCTITE
®
is a registered trademark of Henkel Corporation
DEXRON
®
is a registered trademark of GM Corporation.
PARKER
®
is a trademark of Parker Hannifin Corporation
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