TM-G84
Rev.: H DCR# 15-0406
DATE: 5/5/15
Federal Identification Code: 11815
© 2015 Cherry Aerospace
T O O L O V E R H A U L
Tool overhaul is needed in case of tool malfunction, massive fluid loss or as part of your routine maintenance program.
TOOLS NEEDED:
G740KT
– tool kit,
Needle Nose Pliers
,
G84KS
– service kit:
OVERHAUL PROCEDURE
Caution:
•
Maintenance and repair to be conducted only by trained personnel.
•
Prior to attempting any repair or maintenance work, make sure the air is disconnected.
•
Follow these instructions. Use special care handling sealing surfaces to avoid damage.
•
Replace all seals; before re-assembly, apply an O-ring lubricant (Parker
®
silicone lube or equivalent) on all O-rings
•
A
pply a small amount of Loctite® 242 on the threaded components; curing time about 30 to 60 minutes.
•
After tool overhaul, fill and bleed per instructions on page 6.
AIR VALVE SUB-ASSEMBLY
Disassembly Instructions:
•
Remove retaining ring (55) and muffler (54).
•
Pull the valve plug (53) and spool subassembly (80) out with the help of tool P1178;
•
If necessary, pull the valve sleeve (46) with l tool 837B740 after dislodging the spring (47) with a needle-nose pliers and pulling it out.
Assembly Instructions:
•
Reverse the above procedures. Use Install tool 836B740 to push spring (47) into its groove.
HEAD SUB-ASSEMBLY
Disassembly:
•
Remove end cap (4). Thread tool 744-103 onto head piston (10) and push it out of the head cylinder (13).
•
O-rings and back-up ring can be removed using a bent hook. Replace all seals.
•
Remove the pressure relief valve sub-assembly (78); unscrew the ball seat (24) carefully from the spring seat (29) using soft jaws.
When all components have been removed, clean and dry thoroughly
Re-assembly:
•
Reverse the above directions; before re-attaching, fill the handle with fluid to the top.
836B740
Valve Spring Installation
Tool
837B740
Valve Sleeve Removal
Tool
700A61
Piston Rod
Wrench
744-104
Seal Guide
740A43
Power Cylinder Tool
700B65
Packing Plug Wrench
700A77
Air Bleeder
G740KT TOOL KIT
7