Lull 944E-42 Service Manual - Manual (Page 181)

6.5 Model 644E-42/944E-42 Rev. 6/04
Transmission: ZF 4WG-92/98 TSC & Transfer Case: ZF TB92-I4
6.6.2 Transmission Maintenance Schedule
Complete transmission maintenance information is
located in the appropriate Owners/Operators Manual.
• At ten hour intervals, check the transmission oil
level. (Refer to the appropriate Owners/Operators
Manual.)
• When the vehicle completes its first 100 hours of
use, change the transmission oil & filter. (Refer to the
appropriate Owners/Operators Manual.)
• At 1,000 hour intervals, change the transmission oil
and filter. (Refer to the appropriate Owners/
Operators Manual.)
Periodically, depending on operating conditions and
other factors, back flush the transmission oil cooler,
which is part of the radiator assembly. ALWAYS back
flush the transmission oil cooler after removing the
transmission for repair or replacement.
The transmission oil cooler outlet hose (3), connects to
tubing that transports the oil, to the transmission oil cooler
inlet hose (5), that is in turn routed to the return oil cooler
fitting, (located near the right front of the transmission).
The transmission oil cooler inlet hose (4), connects to
tubing that brings oil from the transmission outlet hose (6)
that is in turn connected to the transmission outlet fitting
(located on the lower right hand side of the transmission).
(Refer to Section 7.6.4, “Radiator, Transmission Oil
Cooler and Hydraulic Oil Cooler Replacement,” for
replacement procedures.)
Disconnect and back flush the oil cooler portion of the
radiator with oil and compressed air until all foreign
material is removed. If necessary, remove the radiator
from the vehicle and clean the oil cooler circuit using oil,
compressed air and steam.
IMPORTANT: DO NOT use flushing compounds for
cleaning purposes. 4110390
1.
2.
OU0780
1
2
CAUTION:
DO NOT exceed 165 psi
(39.6 bar) when back flushing the oil cooler.
Applying too much pressure may damage the
oil cooler/radiator.
MU0950
Rear
3
4
MU0940
Front
5
6