INSTALLATION 1400H OPERATOR AND SERVICE MANUAL
7-6 Published 10-30-2014 Control # 040-09
PTO HORSEPOWER REQUIREMENTS
A three pump hydraulic system is furnished with this
crane. The unit is equipped with a three section pump that will
supply 32 gpm (121 lpm) to the hoist, 32 gpm (121 lpm) to the
boom and telescope and 16 gpm (61 lpm) to the turn and
outriggers circuit. To provide these flows, the pump shaft
must turn at the proper rpm as shown below. The PTO
requirement is a torque rating of at least 400 lb-ft (542 Nm) or
85 HP (63 kW) per 1000 rpm of PTO shaft speed.
Direct Mount Pump to PTO
Most pump installations can be direct mounted to the
PTO using adapter assemblies available from the PTO
supplier. If the pump is direct mounted, its weight should be
supported by a strap between the pump and the
transmission. The splined shaft coupling in a direct mount
pump installation requires lubrication. #200S Silver Streak
Special Multi-Lube (Medium) should be applied to the shaft
during original installation and reapplied to the shaft or zerk
provided on PTO housing shaft semi-annually thereafter.
PTO Ratio
Pump shaft speed is determined by truck engine rpm
and PTO ratio:
Pump Shaft Speed =
Truck Engine rpm X PTO Ratio
The following PTO ratio - engine speed combinations
will provide the proper rpm pump shaft speed which is the
recommended maximum speed for the 1400H pump:
The speeds shown below are optimum operating
speeds. The engine must be operated at a speed such that
the horsepower developed is adequate to pull the pumps
under pressure and flow requirements.
Pump Rotation
It is imperative that the three section hydraulic pump
installed in a 1400H application be the correct pump rotation
configuration for the truck drive train/power take off rotation
direction. Make certain which direction the power take off
output shaft rotates before selecting a clockwise (cw) or
counter-clockwise (ccw) rotation hydraulic pump. Either cw
or ccw rotation pumps are available, and are marked clearly
with a directional arrow on the pump housing.
Do not attempt to turn pump in the opposite
direction of the indicating arrow on the pump housing.
Pump failure will result.
Do not confuse engine crankshaft rotation with power
take off rotation. If the power take off shaft rotates opposite
the engine crankshaft, it is turning in a clockwise (cw)
direction when viewed from the rear of the truck. If the power
take off shaft rotates the same as the engine crankshaft, it is
turning in a counter-clockwise (ccw) direction when viewed
from the rear of the truck. See illustration below.
PUMP VENDOR rpm
CASAPPA 1800
DENISON 2000
HALDEX 2200
ENGINE SPEED
(rpm)
PTO RATIO
1800 rpm
PUMP
2000 rpm
PUMP
2200 rpm
PUMP
Gasoline
Engine
Optimum
Speed
Range
Diesel
Engine
Optimum
Speed
Range
2900
2800
2600
2400
2200
2000
1800
1600
1500
1400
62%
64%
69%
75%
82%
90%
100%
113%
120%
129%
69%
71%
77%
83%
91%
100%
111%
125%
133%
143%
76%
79%
85%
91%
100%
110%
122%
138%
147%
157%
VIEW FROM REAR
OF VEHICLE
CRANKSHAFT
ROTATION
CW POWER
TAKE OFF
ROTATION
OPP: OPPOSITE OF THE
CRANKSHAFT ROTATION
CCW POWER
TAKE OFF
ROTATION
CRANKSHAFT
ROTATION
CRNK: ENGINE CRANKSHAFT
ROTATION
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