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TMS800E SERVICE MANUAL
HYDRAULIC PUMPS
Description QSM Cranes
The No. 1 hydraulic pump is frame-mounted above the
transmission. A drive shaft attached to the rear engine PTO
drives this combination piston pump and gear pump. The
piston pump has two sections, the first section displacement
is 112 cm³/rev (6.8 inch³/rev) and pumps at a rate of 216.1
lpm (57.1 gpm). The second section displacement is 80 cm³/
rev (4.9 inch³/rev) and pumps at a rate of 154.4 lpm (40.8
gpm). The gear pump displacement is 29 cm³/rev (2.4 inch³/
rev) and pumps at a rate of 76.1 lpm (20.1 gpm).
The No. 2 hydraulic pump is mounted on the engine and is
directly driven by the engine. Each section is a gear pump;
each gear pump displacement is 43.8 cm³/rev (2.67 inch³/
rev). Both sections pumps at a rate of 73.4 lpm (19.4 gpm).
The purpose of these pumps is to convert the mechanical
energy of the engine into fluid energy for the operation of the
crane's hydraulic components.
Description ISX Cranes
The No. 1 hydraulic pump is frame-mounted above the
transmission. A drive shaft attached to the rear engine PTO
drives this combination piston pump and gear pump through
an air operated clutch. The piston pump displacement is 200
cm³/rev (12.2 inch³/rev) and pumps at a rate of 364.5 lpm
(96.3 gpm). The gear pump displacement is 27.8 cm³/rev
(2.4 inch³/rev) and pumps at a rate of 85.9 lpm (18.9 gpm).
The No. 2 hydraulic pump is mounted on the engine and is a
gear pump; the pump displacement is 44 cm³/rev (2.69 inch³/
rev). Both sections pumps at a rate of 73.4 lpm (22.7 gpm).
The No. 3 hydraulic pump is mounted on the air compressor
and is a gear pump; the pump displacement is 27.8 cm³/rev
(2.4 inch³/rev) and pumps at a rate of 76.8 lpm (20.3 gpm).
The purpose of these pumps is to convert the mechanical
energy of the engine into fluid energy for the operation of the
crane's hydraulic components.
Maintenance QSM Cranes
No. 1 Pump Removal
CAUTION
Absolute cleanliness is essential when working on the
hydraulic pumps. The presence of dirt and foreign
materials in the system can result in serious damage or
inadequate operation.
GROVE
1.
Remove carrier parts as needed to gain access to the
pump.
2.
Tag the supply lines to the pump and tag the distribution
lines from the pump, then disconnect them from the
pump. Cap or plug the lines and ports.
3.
Remove the four bolts and washers to free the pump
from the PTO shaft. Secure the shaft so it doesn't
damage other parts.
Keep the pump as level as possible to avoid damaging
the input spline.
NOTE:
The weight of the pump assembly is approximately
143kg (383lb).
4.
Secure the pump so it won't fall when free. Remove the
bolts, washers, and nuts to free the No. 1 pump from its
support bracket. Remove the pump from the crane. Or if
it is more convenient, remove the bolts, washers, nuts,
and spacers to free the support bracket from the carrier,
and lift the pump and its support bracket out together.
Then remove the pump from the support bracket.
No. 1 Pump Inspection and Repair
Refer to the Shop Reference and Maintenance Guide for
repair instructions as applicable.
No. 1 Pump Installation
1.
Secure the No. 1 pump to the support bracket with bolts,
washers, and nuts. Torque bolts, refer to Fasteners and
Torque Values, page 1-13. If reinstalling the support
bracket also, secure the support bracket to the carrier
with bolts, washers, nuts, and spacers. Torque these
bolts, refer to Fasteners and Torque Values, page 1-13.
2.
Connect prop shaft to pump assembly with bolts and
washers. Torque bolts, refer to Fasteners and Torque
Values, page 1-13.
3.
Connect the distribution and supply lines as tagged
during removal.
4.
Install carrier parts removed for access earlier.
No. 1 Pump Piston Pump Section Startup Procedure
1.
Ensure the reservoir is filled with the proper hydraulic
fluid to the high level mark on the reservoir sight gauge.
2.
Ensure no air is entering the pump inlet, and that the
pump suction or inlet fluid is not bleeding back to the
reservoir when the engine is stopped, by making sure all
suction or inlet lines are air tight.
NOTE:
The following step can be done before the pump is
installed by removing the plastic cap from "T1" port,
and checking to ensure "T2" port on the opposite
Published 01-29-2014, Control # 496-00
HYDRAULIC SYSTEM
CAUTION
2
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