Specifications

Power Train Testing and Adjusting 47
NOTICE
To make sure that the transmission oil does not get
hot, do not hold the transmission in a stall condition for
more than ten seconds. After the transmission is
stalled, put the controls in NEUTRAL and run the
engine at 1200 to 1500 RPM to cool the oil.
3. Repeat the procedure above for the REVERSE
direction.
4. The stall speeds for the different trucks are listed in
the charts that follow:
Stall speeds that are low are an indication that the
engine performance is not correct or the one-way
cutch of the torque converter does not hold in reverse
direction. If the one-way clutch has a defect, the stall
speed will probably be more than 800 rpm low.
The stall speed must be the same in FORWARD and
REVERSE. If the stall speed is high in FORWARD and
REVERSE, check the following:
a. Check for air in the oil.
b. Check the torque converter and the clutch
pressures according to transmission Pressure
Tests in Testing and Adjusting.
c. If clutch pressure is correct, make an inspection
of the clutch assembly for that direction for
possible damage to clutch components.
LIFT TRUCK STALL SPEED
Engine
Max.RPM
Engine
RPM±100
Without Power
Brakes Applied
RPM±100
With Power
Brakes Applied
-
B3.3 1,780 1,680 2,200
4TNV98 1,840 1,740 2,350
4TNE98 1,720 1,620 2,540
HMC
G420F(E)
LP
1,860 1,760 2,500
HMC
G420F(E)
GAS
1,860 1,760 2,500
HMC
G420F(E)
Dual
1,860 1,760 2,500
GM
G424F(E)
LP
2,030 1,930 2,550
GM
G424F(E)
GAS
2,030 1,930 2,550
GM
G424F(E)
Dual
2,030 1,930 2,550