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312375J 7
Repair
Troubleshooting
See Check-Mate Pump Packages manual 312376.
Required Tools
• Torque wrench
• Bench vise, with soft jaws
• Rubber mallet
•Hammer
• 400 mm (15.8 in.) adjustable wrench
• O-ring pick
• Flat head screwdriver
• 13 mm (1/2 in.) dia. brass rod
• Set of socket wrenches
• Set of adjustable wrenches
• Packing nut wrench (supplied with
pump package)
• 24 in. (610 mm) adjustable wrench
• M4 hex key wrench
• Thread lubricant
• Thread sealant
•Loctite
®
2760
™
or equivalent
Disassembly and Reassembly of
Throat Packings and Cartridge
All new Check-Mate displacement pumps are equipped
with a throat packing cartridge (3) that enables easy
removal and replacement of throat packings without the
complete disassembly of the displacement pump.
1. Run air motor and displacement pump to bottom of
stroke.
2. Relieve pressure. See Check-Mate Pump Packages
manual 312376 for instructions.
3. Remove air motor coupling assembly from displace-
ment rod. See Check-Mate Pump Packages manual
312376 for instructions.
4. Push air motor piston rod up to top of stroke.
5. Remove wet cup cover (present on enclosed wet
cups only).
6. Place an absorbent cloth in wet cup (9) to absorb
Throat Seal Liquid (TSL).
7. Use packing nut wrench (supplied) to loosen and
remove packing nut/enclosed wet cup (9).
8. Use an adjustable wrench to loosen cartridge (3);
slide it and throat packings (P) up and off displace-
ment rod (1).
9. Replace throat packings (P) according to specific
packing kit into cartridge (3). See Packing Kits in
Parts starting on page 18.
10. Remove and replace o-ring (4).
11. Slide cartridge (3) and throat packings (P) back on
to displacement rod (1). Be careful to not damage
packings.
F
IG. 2
F
IG. 3
9
ti10623a
P
P
3
4
1
2
ti11118a
(Severe Duty)
(MaxLife)