
Reference
Only
POWER TRAIN
18000 SERIVCE/MAINTENANCE MANUAL
7-12
Published 12-05-17, Control # 035-23
ENGINE THROTTLE ADJUSTMENT
The engine throttle assembly consist of an electronic hand
throttle controller in the left console and an electronic foot
throttle controller on the cab floor. There is no mechanical
linkage between the controllers.
Electronic signals from the throttle controllers are transmitted
t o t h e c r a n e ’s p r o g r a m m a b l e c o n t r o l l e r, a n d t h e
programmable controller increases and decreases engine
speed accordingly.
FOOT THROTTLE CONTROLLER
for the following procedure.
The foot throttle controller was properly assembled and
calibrated at initial installation and should not require further
attention.
Assemble and calibrate the foot throttle controller as follows
if it is repaired or replaced.
Assembly
1.
To assemble shaft (3) and torsion spring (5) into housing
(1), first assemble spring onto shaft by inserting lug on
one end of spring into hole in head of shaft.
2.
Insert shaft (3) into cavity in bottom of housing (1),
through bearing (9), and into pedal (2).
Lug on outboard end of spring (5) must engage hole in
housing (1) (Section A-A).
3.
Insert shaft (4) into cavity in bottom of housing (1),
through bearing (9), and into pedal (2).
4.
Rotate pedal (2) as needed and install roll pins (14)
through holes in pedal and shafts (Pedal Position "A").
5.
Install setscrew (16). Do not insert deep enough to
contact head on shaft (3).
6.
Rotate pedal approximately 40° to position "B" (low idle).
At this time flat on head of shaft (3) should be parallel
with surface X on housing. Finish turning in setscrew
(14) until it contacts flat on head of shaft (Section A-A).
Calibration
Supply voltage to be 25.0 to 26.0 VDC.
1.
Turn potentiometer (7) shaft fully CCW as viewed from
shaft end (zero volts out).
2.
With pedal (3) in Position B, insert potentiometer (7) into
cavity in bottom of housing (1) as shown in View B-B.
Insert potentiometer shaft into end of shaft (4) and
tighten setscrew (22).
3.
Rotate pedal to high idle position, hold in place using
setscrew (16), and rotate potentiometer housing to
obtain an output of 0.90 to 1.00 VDC.
4.
Apply silicone sealant RTV-162 (MCC #622201)
between housing (1) and potentiometer (7). Do not get
sealant on shaft (4). Allow sealant to cure one to two
hours before proceeding to next step.
5.
After sealant has cured, check output for 0.90 to 1.00
VDC in high idle position.
6.
Remove setscrew (16), apply LOCTITE #242 (MCC
#622293) to threads, and adjust setscrew to obtain a low
idle position output reading of 2.90 to 3.00 VDC.
ENGINE SPEED CALIBRATION
Engine speed is calibrated automatically by the crane’s
programmable controller:
•
HIGH IDLE = 1,800 rpm
•
LOW IDLE = 1,050 rpm
Component Identification for
Item
Qty. Description
Item
Qty
.
Description
1
1
Foot Pedal Housing
10
1
Conduit Nut (1/2 in.)
2
1
Foot Pedal
11
2
Roll Pin (3/16 in. Diameter x 1-1/2 in. Long)
3
1
Foot Pedal Shaft (right)
12
1
3-Pole Male Receptacle
4
1
Foot Pedal Shaft (left)
13
1
Resistor (220 Ohm, 1Watt)
5
1
Torsion Spring
14
2
Hex Head Cap Screw (3/8 in.-16UNC x 3/4 in. Long)
6
1
Receptacle Mounting Bracket
15
2
Flat Head Brass Screw (#6-32UNC x 1/2 in. Long)
7
1
Potentiometer
16
1
Allen Head Cup Set Screw (5/6 in.-18UNC x 3/4 in. Long)
8
1
Zener Diode (22 VDC, 5 Watt)
17
1
Allen Head Cup Set Screw (#6-32UNC x 3/16 in. Long)
9
2
Roller Bearing
18
2
Lockwasher (3/8 in.)
Содержание 18000
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Страница 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Страница 210: ...R e f e r e n c e O n l y NOTES SKETCHES AND PHOTOGRAPHS ...
Страница 315: ...R e f e r e n c e O n l y ...
Страница 316: ...R e f e r e n c e O n l y ...