POWER TRAIN GRT880 SERVICE MANUAL
7-26
Published 10/19/2017, Control # 618-00
Removal
1. Extend and set outriggers just enough to take up the
slack in the outrigger pads. Chock the wheels.
2. Position the boom over the side and stop the engine.
3. Remove the engine and transmission/torque converter
from the crane as an assembly. Refer to Engine
Removal, page 7-2.
4. Remove the two-section and single section hydraulic
pumps from the transmission/torque converter. Cover all
openings. Refer to in Hydraulic Pumps, page 2-18 for
removal of the pump.
NOTE: The transmission/torque converter weighs
approximately 438 kg (966 lb) dry.
5. Attach an adequate lifting device to the transmission/
torque converter and take up any slack.
6. Remove the capscrews and hardened flat washers
securing the drive plate assembly to the flywheel.
7. Remove the nuts and washers securing the
transmission/torque converter housing to the engine
flywheel housing.
Installation
NOTE: The transmission/torque converter assembly
weighs approximately 438 kg (966 lb) dry.
1. If a new transmission/torque converter is to be installed,
remove all fittings and brackets from the old one and
install them in the same locations on the new
transmission/torque converter.
2. Install the two variable displacement pumps and the
gear pump on the transmission/torque converter. Refer
to Hydraulic Pumps, page 2-18 for installation of the
hydraulic pump.
3. Position the transmission/torque converter to the engine
with the lifting device.
4. Remove all burrs from the flywheel mounting face and
nose pilot bore. Clean the drive plate surface with
solvent.
NOTE: Refer to Figure 7-18.
5. Check the engine flywheel and housing for conformance
to standard S.A.E. No. 3/S.A.E. J-927 tolerance
specifications for bore size, pilot bore runout and
mounting face flatness. Measure and record engine
crankshaft end play.
6. Install the 12 studs in the engine flywheel housing.
Rotate the engine flywheel to align a drive plate
mounting screw hole with the flywheel housing front
access hole.
7. Install a 101.6 mm (4.00 in) long drive plate locating stud
3/8-24 UNF in a drive plate nut.
8. Rotate transmission/torque converter to align locating
stud in the drive plate with flywheel drive plate mounting
screw hole positioned in step 6. Locate the transmission
on the flywheel housing, aligning the drive plate to the
flywheel and the transmission on the flywheel housing
mounting studs. Install the transmission to flywheel
housing nuts and washers. Tighten the nuts to 41 Nm
(30 lb-ft).
9. Remove drive plate locating stud. Install one drive plate
attaching capscrew and lockwasher. Snug capscrew but
do not tighten.
NOTE: Some engine flywheel housings have a hole
located on the flywheel housing circumference in
line with the drive plate screw access hole. A
screwdriver or pry bar used to hold the drive plate
against the flywheel will facilitate installation of the
drive plate capscrews.
10. Rotate engine flywheel and install the remaining seven
flywheel to drive plate attaching capscrews and
hardened flat washers. Snug the capscrews but do not
tighten. After all eight capscrews and hardened flat
washers have been installed, torque the capscrews to
38 Nm (28 lb-ft). This will require torquing each
capscrew, then rotating the engine flywheel until all
capscrews have been torqued.
11. Measure the engine crankshaft end play after the
transmission/torque converter has been completely
installed on the engine flywheel. This value must be
within 0.025 mm (0.001 in) of the end play recorded in
step 5.
12. Install the engine and transmission/torque converter in
the crane as an assembly. Refer to Engine, page 7-1.
13. Service the crane as outlined under Servicing the Crane
after Transmission/torque Converter Overhaul, page 7-
28.
14. Cycle all functions and observe for proper operation.
Reference Only
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