TM-G702A
Rev.: D, 4-30-15, DCR# 15-0423
Federal Identification Code: 11815
© 2015 Cherry Aerospace
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5
FILL AND BLEED INSTRUCTIONS
To replace a small amount of oil in the tool, remove cap screw (15), attach the Cherry air bleeder (700A77), connect the tool to the
air line and cycle several times. This will ensure the removal of any air from the hydraulic system and its replacement with fluid.
Should it become necessary to completely refill the tool (such as would be required after the tool has been dismantled and re-
assembled), take the following steps:
1.
Remove head assembly (1) from handle (32)
by unscrewing cap screws (50).
2.
Fill handle assembly (32) with the recommended fluid
to within 1/8" (3.175mm) of the top of the handle
casting.
3.
Place head assembly (1) on handle (32), being sure
gasket (49), and 0-ring (48), are properly in place.
Tighten cap screws (50) uniformly to prevent
leakage around gasket.
4.
Remove cap screw (15) and attach the Cherry
air bleeder (700A77). Connect the tool to the air line
and cycle a number of times. This will ensure the
removal of any air from its hydraulic system and its
replacement with fluid.
TROUBLESHOOTING GUIDE
PROBLEM
POSSIBLE REASONS / SOLUTIONS
Piston does not move after depressing Trigger
- 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.
Short stroke or low pull force
-
Significant fluid loss:
Bleed the system to purge the air out.
If performance doesn’t improve, or excessive leakage continues, see below.
Head Cylinder Fluid leakage
-
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 or back of head cylinder indicate worn/ damaged seals
Service head cylinder per instructions provided herein
Air leakage at the spool valve
-
Broken or dislodged valve spring.
-
Worn or damaged valve spool seals:
Disassemble and service air valve per Air
Sub-Assembly Overhaul Instructions.
Head piston is slow or seizes
- Piston or seal damage
: Service head cylinder.
-
Oil bypassing due to power piston displacement off its seat:
Service Handle
Subassembly per instructions provided below.
-
Clogged air muffler or filter
Clean thoroughly with solvent and back-blow with
compressed air.
