Troubleshooting - Cherry G704B-SR Original Instructions Manual

TROUBLESHOOTING

PROBLEM
Piston does not move after depressing Trigger
Short stroke or low pull force
Head Cylinder Fluid leakage
Air leakage at the spool valve
Head piston is slow or seizes
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.
- Broken power piston: Service the Handle Subassembly.
- Significant fluid loss: Bleed the system to purge the air out.
If performance doesn't improve, or excessive leakage continues, see below.
- Leaks around the seals or fittings indicate that they are not tightened to seal
properly: Tighten until no more leaks are observed.
- Leaks at the front of head cylinder indicate worn/ damaged seals
Service head cylinder per instructions provided herein
- Broken or dislodged valve spring- Service and replace
- Worn or damaged valve spool seals: Disassemble and service air valve per Air
Sub-Assembly Overhaul Instructions.
- Piston or seal damage: Service head cylinder.
- Clogged air muffler or filter Clean thoroughly with solvent and back-blow with
compressed air.
Supplier's Federal Identification Code: 11815
5
TM-G704B_SR; Rev.: A
Date: 11/06/13
DCR# 13-1687