Manitowoc 999 Service And Maintenance Manual

Reference Only
Manitowoc Published 05-16-17, Control # 233-03 7-9
999 SERVICE/MAINTENANCE MANUAL POWER TRAIN
7
ENGINE THROTTLE
The throttle assembly for the Cummins engines consist of an
electronic control module (ECM) on the engine, a hand
throttle controller in the left console, a foot pedal on the cab
floor, a foot throttle controller in the right console, associated
linkage, and electrical connections.
A reach rod in the right console connects the foot pedal to
the lever on the foot throttle controller. An electric cable
connects the foot throttle controller in the right console to the
hand throttle controller in the left console.
Foot Throttle Linkage Adjustment
See Figure 7-7 for the following procedure.
1. Install spring clip (1) and rod end (2) on controller lever
at dimension shown in View A and securely tighten jam
nut (3).
2. Insert a 3/16 in (5 mm) thick shim or piece of floor mat
between foot pedal and cab floor.
3. Press foot pedal down fully to high idle position against
shim or floor mat.
4. Adjust reach rod (4) and rod end (5) so controller lever is
rotated fully to high idle position. Securely tighten jam
nuts (6) to lock adjustment.
NOTE: Both controllers have internal stops at high and low
idle.
5. Release foot pedal to low idle position.
6. Adjust return springs so there is sufficient force to raise
pedal and rotate controller lever to low idle.
7. Adjust pedal stop screw (7). Screw must be tight against
cab floor and there must be 1/8 in (3,2 mm) gap between
pin (9) and rear end of slot in rod end (5). Securely
tighten jam nut (8).
8. With foot pedal in low idle position, distance from top of
pedal to cab floor should be 3-15/16 in (100 mm).
Engine Idle Speed
Engine idle speed is set by the crane’s programmable
controller:
• HIGH IDLE = 1,800 rpm
• LOW IDLE = 1,000 rpm
Wiring Diagram
For a wiring diagram of the system, see Electrical Operator’s
Cab Wiring drawing in your Parts Manual.
Lever
Spring
Low Idle
High Idle
Low Idle
High Idle
Spring
3-15/16 in
(100 mm)
4566
9
7
Foot Throttle
Controller
see View A
3/16 in (5 mm)
Shim or
Floor Mat
Foot
Pedal
Lever
Cab
Floor
Foot
Pedal
75°
Ref.
8
2
1
3
Foot
Throttle
Controller
2-1/4 in
(57 mm)
A974
View A
Item Description Item Description
1 Spring Clip 6 Jam Nut
2 Rod End 7 Pedal Stop Screw
3 Jam Nut 8 Jam Nut
4Reach Rod 9Pin
5Rod End
FIGURE 7-7

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English