transmission and allied hydraulic system by a qual-
ified mechanic will be required.
Check Transmission Clutch, Lubricating, and
Oil Cooler Pressures: Check transmission clutch,
transmission lubricating and oil cooler pressures at
specified intervals, or whenever machine evidences
overheating or no power in any speed range in for-
ward or reverse direction.
Pressure checks must be taken with fluid hot
(180F. to 200F.).
(a) Transmission Clutch Pressure: Pressure
check should be made in all speed ranges in both
forward and reverse directions. Wheels of machine
Fig. 27. Transmission Lubricating Pressure
should be securely blocked and parking brake ap-
given in Specifications and Service Data section
plied.
at rear of this manual.
1. Install an accurate gauge (0 to 400 psi capacity)
If pressure is not as specified, further trouble
o n the transmission clutch pressure port quick
shooting of torque converter and transmission by
release fitting in the rear of cockpit.
a qualified mechanic will be required.
2. Check pressure with engine at IDLE.
(c) Oil Cooler Pressure: The drop in pressure
across the oil cooler at bottom of radiator will in-
dicate whether oil cooler has or is becoming plug-
3. Read gauge in NEUTRAL ; then engage clutches
ged with foreign material causing overheating.
one at a time. Minimum pressure reading should
b e as specified in Specifications and Service
P r e s s u r e check must be made with fluid hot
Data section at rear of manual.
( 1 8 0 F . to 200F.) using accurate gauges (0 to
100 psi capacity) at 2000 rpm.
If pressure is not as specified, further trouble
1. Install tachometer on engine. Install gauges at
shooting of the transmission, torque converter and
c o o l e r IN and cooler OUT pressure ports as
allied hydraulic system by a qualified mechanic is
shown in Figures 28 and 29.
required.
2 . Attach safety links, apply parking brake and
shift directional lever into NEUTRAL position.
(b) Transmission Lubricating Pressure: The
transmission lubricating manifold insures proper
and shafts, Periodically, lubricating pressure
should be checked when fluid is at operating tem-
p e r a t u r e (180F. to 200F.) and engine operating
at maximum rpm.
1. Shut down engine and remove pipe plug from
t r a n s m i s s i o n lubricating manifold. Install an
accurate gauge (0 to 100 psi capacity) as shown
in Figure 27, Item 1.
2. Place directional shift lever in NEUTRAL and ap-
ply parking brake.
1. Pressure Port
3. Start engine and accelerate to maximum rpm.
G a u g e reading must not exceed the pressure
Fig. 28.
Check Pressure - OIL Cooler IN
[45-05-3]
