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Section III: REPAIR PROCEDURES
Up
TM-55-4920-405-13-P Test Stand Hydraulic System Gasoline Engine Driven Type D-5C Manual
Next
Figure 4-5. Removal of Minor Engine Components
TM 55-4920-405-13&P
Legend for fig. 4-5:
(a) Release the eight quick disconnect
fasteners (two on each of the four
1.
Magneto
7.
Oil filler tube
sides of the cabinet assembly) that
2.
Spark plug
8.
Support bracket
attach the cabinet assembly to the
3.
Mufflet
9.
Starter motor
trailer frame.
4.
Manifold
10.
Air cleaner
(b) Lift the cabinet assembly off the
5.
Fuel pump
11.
Carburetor
trailer frame.
6.
Fuel strainer
(c) Disconnect the fluid lines from the
hydraulic fluid reservoir.
(c) Remove the knurled round nut that
(d) Remove the mounting bolts, nuts, and
attaches the switch to the front of the
lockwashers that attach the hydraulic
control panel.  Remove the switch
fluid reservoir to the trailer frame.
from the control panel.
(e) Remove the hydraulic fluid reservoir.
(d) Replace the defective switch.
(f) Replace the defective hydraulic fluid
reservoir.
(9) Starter Solenoid.  The starter solenoid is
located on the back side of the start-up
( 3 ) Low Pressure Filter Assembly. To re-
control panel, near the battery. To re-
move low pressure filter assembly (7,
move the starter solenoid, proceed as
figure 4-6), proceed as follows:
follows:
(a) Using the proper size wrench, discon-
nect the inlet and outlet couplings.
(a) Remove the nuts that attach the elec-
trical cables to the starter solenoid
(b) Remove the four bolts that attach the
terminals.
mounting bands to the test stand
(b) Remove the screws and lockwashers
f r a m e .  Support the low pressure
filter assembly while removing these
that attach the starter solenoid to the
control panel, and remove the starter
bolts.
solenoid.
(c) Replace the defective low pressure
filter assembly.
(c) Replace the defective starter solenoid.
NOTE
( 4 ) High Pressure Filter Assembly. To re-
move high pressure filter assembly (4,
Removal of the alternator, voltage regula-
figure 4-6) proceed as follows:
tor, rectifier unit, and engine high-
temperature safety switch involves partial
(a) Disconnect the two bypass couplings
for the switch on top of the high pres-
disassembly of the engine. Removal pro-
sure filter assembly.
cedures for these items are, therefore,
(b) Disconnect the inlet and outlet tube
included with the engine removal
procedures.
couplings.
(c) Remove the high pressure filter
b . Hydraulic System.  Before removing any com-
assembly.
(d) Replace the defective high pressure
ponents of the hydraulic system, drain the hydraulic
filter assembly.
fluid.  (Refer to paragraph 3-2b.) Then, proceed as
follows:
(5) Hydraulic Fluid Manifold. To remove
(1) Tubing, Hoses, and Fittings. To remove
hydraulic fluid manifold (6, figure 4-6),
proceed as follows:
tubing, hoses, or fittings, proceed as
follows:
(a) Disconnect the five hydraulic tube
Tag each item that you intend to re-
couplings from the ports on the
(a)
move so that you will knowhow to re-
hydraulic fluid manifold.
(b) Disconnect the electrical wiring from
connect it.
the temperature switch on the
Using the proper size wrench, discon-
(b)
hydraulic fluid manifold.
nect the coupling.
(c) Disconnect the temperature sensor.
Use the proper size wrench to remove
(c)
(d) Remove the hydraulic fluid manifold.
fittings after you have disconnected
(e) Replade the defective hydraulic fluid
the hose or tubing.
manifold.
------ --
CAUTION
----
--
( 6 ) Compensator Control. To remove PRES-
Remove only those parts that you have to
SURE COMPENSATOR (16, figure 2-1),
proceed as follows:
replace. Use care to avoid bending or
denting hydraulic tubing.
(a) Unlock the PRESSURE COMPENSATOR
locking control.  Turn the PRESSURE
( 2 ) Hydraulic Fluid Reservoir. To remove
hydraulic fluid reservoir (1, figure 4-6),
COMPENSATOR to its fully counter-
proceed as follows:
clockwise setting.
4-13

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