Section XX. Repair of Water Crossover Pipe and Lifting Eyes

*TM 9-2815-213-34

Chart 4.-Troublsshooting Fuel Pump Continued

Malfunction

Probable cause

Corrective action

FUEL PUMP ASSEMBLY

a. Replace plunger with correct chafer

4. The 40 p.s.i. checkpoint cannot be

Governor plunger has wrong chamfer

obtained within specified maxi

or has a worn chamfer.

b. Refit governor barrel to accept a

mum speed limits

Governor barrel and plunger in

NOTE

correct Aft.

plunger two classes larger.

c. Install correct spring.

"Governor setting 3020 to 3040

Governor torque spring incorrect.

d. Install correct weights Make weight

rpm" is 40 psi manifold pressure

Governor weight incorrect or weight

is specified.

assist setting incorrect.

assist setting 0.890/0.910-inch and

46 to 54 psi e 800 rpm for V8-300 engine pump.

5. Throttle leakage is above specified. a. Throttle shaft scored or incorrect

a. Install new throttle shaft (standard

NOTE

fit in throttle sleeve.

or oversize) and lap to fit.

b. Governor plunger incorrect fit in

b. Install new governor plunger (standard

The permissible throttle leak

age Is 3ce.

governor barrel.

or oversize) and lap to fit.

a. Incorrect idle plunger (button) or

a Install new idle plunger.

6. Incorrect fuel manifold pressure.

NOTE

surface finish is rough.

b. Gear pump fails to pump 850 pounds

b. Install new gear pump.

Fuel manifold pressure should

of fuel per hour at 2100 rpm.

be 227 psi 6 3000 rpm.

c. Wrong throttle restriction.

c. Set throttle restriction at correct value

a. Idle plunger rough or has void &

a. Polish surface with oilstone or re-

7. Incorrect check point pressure.

NOTE

place with like or serviceable part.

b. 800 rpm checkpoint.

b. Check 800 rpm checkpoint under

Checkpoint pressure should be

165 to 170 p.s.i at 2500 rpm.

malfunction No. 8 to be sure it is

within specifications before proceeding.

c. Incorrect torque or governor spring.

c. Remove front cover and check for

proper torque or governor spring.

a. Checkpoint pressure is too low.

a. If weight assist protrusion is within

8. 800 rpm checkpoint out of

specification.

specification (0.890 to 0.910 inch)

NOTE

one or more shims may be added

The desired checkpoint pres-

to the assembly to obtain the

sure at 800 rpm is 46 to p54.

desired pressure.

b. Checkpoint pressure is too high.

b. Remove weight assist shims required to

decrease pressure.

Section XX. Repair of Water Crossover Pipe and Lifting Eyes

connection and new gaskets to right bank cylinder head

3-110. Cleaning

(fig. 210). Secure with lockwashers and cap screws.

Clean components in accordance with paragraph

b. Position water connection with new gasket to left

2-5.

bank cylinder head. Secure with lockwashers and cap

screws.

3-111. Inspection

c. Install new water hose and clamps on water

Refer to paragraph 26 for inspection procedure

crossover pipe.

d. Position crossover pipe to connections. Place

3-112. Repair

hose in position and secure with hose clamps.

Refer to paragraph 2-7 for general repair procedures.

3-113. Installation

a. Position (rear) engine lifting eye, water

Section XXI. Repair of Air Intake Preheater Assembly and Intake Manifolds

c. Remove nozzle (6) and key washer (5) from

3-114. Disassembly

adapter.

(fig. B-20).

d. Remove glow plug from air cleaner assembly

connection.

a. Remove hoses from assembly.

b. Remove preheater adapter (2) from cleaner

assembly connection.

3-52