TM-G746A Rev.: B
DCR# 17-0231
DATE: 3/21/17
Federal Identification Code: 11815
© 2017 Cherry Aerospace
8
SERVICE PROCEDURE
Tools Needed:
700B65 (Packing Plug Wrench), 700A61 (Piston Rod Wrench), 700A62 (Power Cylinder Tool), 700A60 (Seal Guide), 9/64” Hex
Key, A Bent Hook
Disassembly Instructions:
•
Remove the Pulling Head (if any installed) then remove the Head Cylinder (1) by unthreading the four Cap Screws (19)
HEAD SUBASSEMBLY
Tools Needed:
701A67 (Seal Guide), 1-3/8 Standard Wrench, 1/8” and 9/64” Hex Keys
Disassembly Instructions:
•
Remove back cap (12) and push the head piston (7) out carefully.
•
O-rings (5, 8) and Back-up Ring (6) can be removed and replaced using a bent hook.
Re-assembly Instructions
– Use the 701A67 Guide over the Piston threads to protect the seals.
•
Replace all O-Rings and Backup rings then re-assemble by reversing the directions given above.
POWER HANDLE SUBASSEMBLY
Tools Needed:
700B65 (Packing Plug Wrench), 700A61 (Piston Rod Wrench), 700A62 (Power Cylinder Tool), 700A60 (Seal Guide), 9/64” Hex
Key, A Bent Hook
Disassembly Instructions:
•
Remove the Head Cylinder (1) and set it aside
•
Drain all the fluid, then turn up-side down and remove the bottom covers (39 through 43);
•
Push the power piston all the way down and unthread the locknut (38) and then remove the air piston (37) by using wrench
700B65; hold the top of the piston with tool 700A61 to prevent it from turning. Push piston out when completely unthreaded
•
Remove packing plug (34) with the help of wrench 700B65.
•
Tap the power cylinder (26) from the top (use tool 700A62); when loosened, it will fall through the bottom of the handle.
•
Remove all the seals and inspect all components for wear. Replace all seals and worn components
Assembly Instructions:
•
The re-assembly sequence is the opposite of disassembly; to prevent damage to piston threads; suggested tightening torque
for the locknut (38) between 51 and 59 in.-lb. (5.65 and 6.67 N-m).
•
After service, the riveter must be primed and bled (page 15)
AIR VALVE SUBASSEMBLY
Tools Needed:
P1178 (Valve Extractor), 836B700 (Spring Installation Tool), 837B700 (Valve Sleeve Removal Tool), Needle Nose Pliers
Disassembly Instructions:
•
Remove retaining ring (55) and muffler (54).
•
Pull out the valve plug (53) and the Valve Spool (48) with the help of extractor P1178;
•
Dislodge and pull the spring (46) out using needle-nose pliers
•
In the unlikely event that you want to pull the Valve Sleeve (45), use the tool 837B700 (internal expansion collet).
Assembly Instructions:
•
Replace all O-Rings and apply an O-ring lubricant (Parker® silicone lube or equivalent).
•
To re-assemble, reverse the procedure given above; snap the Spring (46) into its groove with the help of tool 836B700
•
Make sure that all retaining rings are properly seated in their grooves. (41) and (55).
