Section V Maintenance Procedures
MAINTENANCE PROCEDURES - GENERAL
BOOSTER PUMP CHECK VALVES - INSPECTION AND REPAIR
BOOSTER PUMP AIR PILOT VALVE - REPLACE
4-13. MAINTENANCE PROCEDURES - GENERAL
Remove or disconnect nitrogen tanks before maintenance. Never disconnect a pressurized line.
When maintenance is required, removal and replacement of a part or assembly is indicated. Removal procedures are
given only to the extent necessary to repair or replace authorized parts. In most cases, removal of the pump panel from
the hand truck is not necessary because most of the components are accessible with the panel on the cart.
4-14. BOOSTER PUMP CHECK VALVES - INSPECTION AND REPAIR
THIS TASK COVERS: REMOVAL, REPAIR AND INSTALLATION
Tools/Test and Support Equipment:
Tool Kit, SC 5180-99-A01, NSN 5180-00-323-
Inlet Check Valve Repair Kit, 93651
Outlet Check Valve Repair Kit, 93652
Teflon tape (D1) or Perma Lok LM012 (D2)
Shop air disconnected. Cart depressurized and
shutdown per paragraph. 2-7.
Inspect all four check valves. Remove and inspect only one check valve at a time on the booster
pump to ensure proper reassembly. Improper assembly of the check valves or the swapping of
the inlet and outlet check valves can cause very high pressures to be trapped in the booster
pump. These pressures can be released suddenly and unexpectedly with any subsequent
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