Table 4-1. Preventive Maintenance Checks and Services.
Interval
B - Before operation
A - After operation
M - Monthly
Item
Operator
Org.
D - During operation
W - Weekly
Q - Quarterly
Number
Daily
B
D
A
W
M
Q
Item to be inspected
Procedure
Reference
1
X
Skid level
Inspect for broken, cracked or dirty level.
2
X
Fuel pump and
Inspect for cracked and leaking pump and
filter
filter. Check for improper alinement and
loose mounting of the pump and filter.
3
X
Inspect for broken and leaking exhaust pipe.
Check inside the duct for any foreign matter
or obstruction.
4
X
Burner electrodes
Inspect burner electrodes for improper spark
and nozzle and gap. Electrodes should be set for a
5/ 32-inch gap. Check burner nozzle for
carbon deposits.
5
X
Burner head and air
Inspect for broken and cracked burner head.
hose
Check for dirty and corroded air hose.
6
X
Upper manifold
Inspect for cracked, broken and leaking relief
valve.
Army Models 41,
44, 45, and York-
Shipley Model
YS49279)
7
X
Water heater tank.
Inspect for dented, broken, cracked, and
instruction plate for broken welds. Inspect
for cracked, broken, and corroded
8
X
Controls and
Check for broken controls and instruments.
instruments
During operation, check for looseness and
4-40)
binding.
Normal operating temperatures and
pressures for the instruments are as follows:
Water temperature gage -
95to 105F.
Fuel pressure gage -
Low fire: 5 psi
Medium fire: 60 psi
High fire: 100 psi
9
X
Electric motors
Inspect motors for loose mounting and any
obstructions to ventilation.
4-43)
10
X
Water pump water
Inspect for cracked, broken, dirty, and
line strainer
corroded strainer.
Note 1. Ground
Before operational test, check for proper
Terminal
ground. A proper ground will consist of a 3/4
inch diameter hallow rod or a %s inch
diameter solid rod. The cable will be 6 AWG
copper wire, bolted or clamped to the rod,
and attached to the ground terminal of the
Note 2. Fire
Before operational test, inspect for broken seal.
Extinguisher
Note 3. Opera-
Observe for any unusual noises or vibration
tional test during operational test. Check fuel line and
water hose assemblies for leaking, electric
motors for overheating and shower nozzles
for improper spraying.
Note 4. Adjustment
Inspect fuel pump for proper pressure
adjustment during operational test.
Inspect for dirty strainer. Check for proper
Note 5. Suction
hose strainer.
positioning of strainer during operational
test.
4-4