TM-9-2350-311-34-2
CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM
TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-2350-311-34-2 - Page 80 of 552
TM 9-2350-311-34-2
2-22 QUICK GUIDE TO TROUBLESHOOTING - CONTINUED
2-22.3 General Troubleshooting Procedures
Refer to the samples below and follow these instructions for using the QUICK GUIDE TO TROUBLESHOOTING (sample
A) and troubleshooting procedures (sample B).
a. Determine the symptom.
b. Locate the symptom (1) in the Quick Guide to Troubleshooting.
c. Locate the troubleshooting paragraph (2) reference for your symptom or maintenance action.
d. Turn to the troubleshooting procedure (3) identified in the Quick Guide to Troubleshooting.
e. Study the function description, pictorial view, and electrical schematic located at the beginning of each section.
f. Perform corrective action (4) as required by troubleshooting procedure.
g. Verify that the corrective action eliminated the symptom.
SAMPLE A
QUICK GUIDE TO TROUBLESHOOTING - CONTINUED
ITEM
SYMPTOM
PARAGRAPH
CANNON
JERKY RECOIL.
CAB HYDRAULIC SYSTEM
HYDRAULIC PUMP MOTOR OPERATES WHEN MASTER SWITCH IS
ON AND CAB POWER SWITCH IS OFF. Replace electromagnetic relay
in power relay box assembly.
8-12
SAMPLE B
3-3 TROUBLESHOOTING CHART - CONTINUED
b. CANNON - CONTINUED
(1) JERKY RECOIL.
Depress cannon to zero mils and inspect muzzle
brake (TM 9-2350-311-10).
Are cracks more than one inch long present?
Replace muzzle brake
(TM 9-2350-311-10).
Check hydraulic pressure on replenisher pressure
gage after mount has cooled (TM 9-2350-311-10).
Is replenisher pressure 17-24 psi (117.215-165.48 kPA)?
2-18
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