TM 5-6115-593-12
TO 35C2-3-463-1
a.
Drain collant into clean container via coolant
drain (see figure 4-2). Save coolant for
reuse.
b.
Unscrew water filter from filter mounting
head. Discard filter.
c.
Clean filter mounting head with solvent (see
table 3-1). Dry with compressed air.
d.
Inspect filter mounting head for cracks and
mutilated threads.
e.
Install new filter by screwing filter to filter
mounting head.
f.
Replace coolant, then check coolant level; if
low add proper coolant (see table 3-1).
4-69.
SPEED SWITCH. (See figures 4-40 and 4-42.)
The speed switch is driven by the engine camshaft. It
provides overspeed protection and starter lockout
protection. Testing of the speed switch requires a
variable speed device and is performed by a higher
level of maintenance. Replace the speed switch as
follows:
a. Removal and Installation
(1)
Remove electrical cable to
connector (1, figure 4-42).
(2)
Unscrew switch from adapter (3), and
remove switch (2). (3) Install switch
(2) to adapter (3). (4) Connect
electrical cable to switch connector
(1).
b.
Test (Static).
(1)
Remove
electrical
cable
from
connector (1, figure 4-42).
(2)
Using ohmmeter set to Rx1 scale,
check that continuity exists between
terminals A-B and H-G on mechanical
type speed switch only.
(3)
With ohmmeter set to Rx1000 scale,
check
for
infinite
resistance
at
terminals A-C, D-E, and F-J, on
mechanical type speed switch only.
(4)
Reconnect electrical cable to switch
connector (1).
(5) For additional tests refer to next higher
level of maintenance.
Figure 4-41. Water Pump Belt Adjustment
4-103
