P O W E R S H I F T T R A N S M I S S I ON
T E S T I N G A N D A D J U S T I NG
TM 5-3805-258-24-1
NOTE: All tests and adjustments must be made with
WARNING
the oil in the hydraulic control system at normal
temperature of operation. Be sure the linkage adjust-
When tests and adjustments are made to the
ments are correct before tests are made.
transmission, remove both front and rear axle
shafts, install the anti-pivot link, and lower the
bucket to the ground. Let only approved per-
sonnel on the machine. Keep other personnel
off the machine and in view of the operator.
Pressure
Oil Pump
Speed Clutch (PI)
(Primary Pressure)
Speed Clutch (P 1)
Direction
Clutch (P2)
Transmission
Lubrication Oil
Neutralizer
Valve
(12)
Pressure
Differential
Valve
(14)
Pressure
Tap
(A)
(E)
(E)
(F)
TRANSMISSION PRESSURE CHART
Governor Control at:
I
Low Idle
High Idle
Adjustment
2140 kPa (310 psi) Minimum
2885 * 115 kPa (390 k 17 psi)
NONE
530 * 22 kPa (77 t 5 psi) with
direction selector in NEUTRAL
speed selector in FIRST. Load
piston plug (G) removed.
Add or remove
to the amount of
spacers (23).
See SPACER
CHART.
Must be 2050 kPa (300 psi)
minimum, with selector
lever in any FORWARD speed
Load piston plug (G) installed.
380 t 35 kPa (55 * 5 psi) less
than the speed clutch pressure.
at tap (E). Load piston plug
(G) installed.
2540 * 105 kPa (370 t 15 psi)
with selector lever in any
FORWARD speed. Load piston
olua (G) installed
380 f 35 kPa (55 * 5 psi) less
than the speed clutch pressure
at tap (E). Load piston plug
(G) installed.
NONE
NONE
(c)
I
I
152 kPa (22 psi) Minimum.
I
NONE
Direction clutch pressure (P2) must go down to O kPa (O psi) when a brake pressure of 345 kPa (50 psi)
is sent to the neutralizer valve. The speed clutch pressure (PI) must drop and then go up to full
pressure. Lower the brake pressure to the neutralizer valve to O kPa (O psi), direction clutch pressure
(P2) must increase until it is 380 t 35 kPa (55 t 5 psi) less than the speed clutch pressure.
With the engine not running, move the direction selection lever to any position except NEUTRAL. Start
the engine and run at HIGH IDLE. The direction clutch pressure (P2) must be O kPa (O psi), the speed
clutch pressure (Pi) must be 2540 * 105 kPa (370 f 15 psi). Move the direction selection lever to
NEUTRAL. The direction clutch pressure (P2) must be 380 f 35 kPa (55 t 5 psi) less than the speed
clutch pressure.
4-49