Bleeding Instructions; Troubleshooting Guide - Cherry CHERRYMAX G746A Original Instructions Manual

TM-G746A Rev.: B DCR# 17-0231
PRIMING THE TOOL
After service, the riveter must be primed with hydraulic fluid before re-assembling the head cylinder.
What is needed: 1/8" and 9/64" Hex Keys; 700A77 Bleed Bottle
Before priming, push power piston (30) all the way down.
• Fill the handle subassembly (20) with hydraulic fluid to about 1/8" below the top.
• Make sure that the O-Ring (17) and Gasket (18) are in place and assemble the Head Cylinder (1)
by tightening the cap screws (19) evenly, one at a time.
• Bleed the system per instructions below.

BLEEDING INSTRUCTIONS

This operation should be done when priming a serviced tool and as part of regular tool maintenance in
order to replenish the hydraulic fluid and remove the air bubbles from the hydraulic fluid.
What is needed: a 1/8" Hex Key; 700A77 Bleed Bottle
• Remove the side Screw (10) and attach the Bleeder Bottle 700A77 upside down (see on the right).
• Cycle several times, changing the position of the tool every few cycles; make sure the empty part of
the bleed bottle is always the highest part of the tool; note if there are air bubbles coming through
the bleed bottle. Continue cycling the tool until no more air bubbles are released into the bottle.
• When done, re-assemble the Screw (10) and Stat-O-Seal (9)

TROUBLESHOOTING GUIDE

PROBLEM
Piston (7) does not
move after depressing
Trigger
Short piston stroke or
low pulling force
Head piston (7) is slow
or it seizes
Fluid leakage at the
Head Cylinder (1)
Fluid leakage at the
side hole of the handle
Air leakage at the air
valve
Slow / Sluggish cycle
DATE: 3/21/17
POSSIBLE CAUSE
1. No air supply is connected
2. Faulty trigger (21)
3. Faulty power piston( 28-30)
4. Valve Spring (46) not correctly installed
Air bubbles in the hydraulic fluid
1. Possible Head Cylinder (1) damage.
2. Dirty/Clogged air muffler (54)
1. Leaks around the gasket (18)
2. Leaks at the front or back of head cylinder (1)
Worn Packing Plug Seals (32,33)
1. Broken or dislodged valve spring (46)
2. Worn or damaged Valve Spool seals (47,52)
Muffler(54) or Spool (48) are clogged up
Federal Identification Code: 11815
1. Make sure the riveter is connected to an air
source.
2. Remove and replace trigger assembly.
3. Service the Handle Subassembly (20).
4. Service the Air Valve; make sure the Spring is
properly engaged in its groove
Bleed per instructions above
1. Service the Head Cylinder
2. Clean muffler thoroughly with solvent and
back-blow with compressed air; replace if
necessary.
1. Tighten screws (19) until no more leaks are
observed; if it still leaks, the gasket and
O-Ring (17, 18) must be replaced.
2. Replace O-Rings (3) and Backup ring (4)
Service Handle (20)
Service the Air valve (44 through 55)
Service the Air valve (44 through 55)
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