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OM3012.2
Operator Cab and Controls
(7) Service Brake Pedal
The Service Brake Pedal is the middle pedal of the
three pedals. It controls a dual hydraulic valve, which
applies both the front dry disc brakes and the rear wet
disc brakes. The service brakes should be used to slow
or stop the truck whenever safety and/or truck
speed/load conditions exceeds the capability of the
retarder.
(8) Throttle Pedal
The Throttle Pedal is the right pedal of the three pedals.
The operator increases engine RPM by depressing the
throttle pedal. Engine RPM is decreased by releasing
the pedal.
(9) Lighter
Used for lighting cigars/cigarettes. Always use CAU-
TION with smoking materials.
(10) Ash Tray
Used for extinguishing and depositing smoking mate-
rials. DO NOT use for flammable materials such as
paper wrappers. Be certain that all fire ash is extin-
guished.
(11) Range Selector
The lever-type range selector has nine positions (R2,
R1, N, D, 5, 4, 3, 2 and 1). To change positions, release
the range holding mechanism (below knob) on the
lever, and move lever to the desired range.
"N" NEUTRAL - used when truck is stopped/parked
with engine operating, and when starting engine.
The truck cannot be started unless the Range Selector
is in NEUTRAL position.
"R1" or "R2" REVERSE position - is used to back the
truck. The Reverse Warning Horn is activated when
either gear is selected. When selecting either reverse
position, COMPLETELY STOP the truck and bring
engine RPM to low idle before shifting from a FOR-
WARD range to a REVERSE range or vice-versa.
"R1" position should be used for normal reverse
operation.
This range selection utilizes the standard 5.12 :
1 gear reduction ratio.
"R2" position may be used for job operations that
would benefit from a
higher speed reverse operation.
This range selection utilizes a 3.43 : 1 gear
reduction ratio.
COMPLETELY STOP the truck and bring engine
RPM to low idle before shifting from "N" to "R1";
"R1" to "R2"; "R2" to "R1"; or from either position
to "N".
"D" DRIVE - position. The transmission will shift to first
gear and as truck speed increases, the transmission
will automatically upshift through each gear to sixth
gear operation. As the truck slows down, the transmis-
sion will automatically downshift to the correct gear.
5, 4, 3, 2 - positions. Road and load conditions some-
times make it desirable to limit the automatic shifting
to a lower range. These positions provide greater en-
gine braking on grades. The transmission will not shift
above the highest gear selected. When conditions
improve, select position D for full range operation.
1 - Use this range selection when pulling through mud
and deep snow, or when maneuvering in tight spaces,
and when driving up or down steep grades where
maximum driving power and maximum engine braking
is needed.
NOTE: As engine and ground speed increases, the
transmission will automatically UPSHIFT to the gear
range required up to the highest range selected. How-
ever, DOWNSHIFTS will not occur, regardless of gear
range selected, until engine and ground speed are
reduced to match the next lower gear range require-
ments.
RANGE SELECTOR
11. Range Selector Knob 12. DO NOT SHIFT Light
Operation - Section 3
Page 3-13
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