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Allison Transmission
Microphone system
MT 644
Allison Transmission MT 644 User Manual
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Operator’
s Manual
A
T
, MT
, HT Series
On-Highway T
ransmissions
OM1334EN
2
Table of Contents
Default Chapter
3
Warnings, Cautions, and Notes
3
Table of Contents
4
Keeping that Allison Advantage
6
Typical AT, MT, and HT Model Transmissions
7
A Brief Description of the Allison Automatic
8
Torque Converter
8
Lockup Clutch (at 1500, MT(B) 600, HT 700)
8
Shift Selectors
10
Allison Automatics
11
Typical AT, MT, HT Shift Selector Positions
11
Range Selection - at 500 Series and at 1500 Series with a Second Neutral (Park)
12
Range Selection - MT 650; MT(B) 653DR
16
Range Selection - HT 750CR, HT 754CR, MT(B) 654CR
18
Range Selection - HT 750DR, HT 750DR DB
20
Driving Tips
22
Throttle Control
22
Downshift Inhibit Feature
22
Operating in Cold Weather
22
Using the Engine for Downhill Braking to Slow the Vehicle or Equipment
23
Using the Hydraulic Retarder
23
Auxiliary Transmission
25
Two-Speed Axle
25
Towing or Pushing
25
Parking Brake
25
Driving on Ice or Snow
26
Rocking out
26
Temperatures
26
Power Takeoff Operation
28
Engine-Driven PTO
28
Converter-Driven PTO
28
Care and Maintenance
30
Periodic Inspections
30
Prevent Major Problems
31
Importance of Proper Fluid Level
31
Transmission Fluid Check Procedure
32
Cold Check
33
Hot Check
34
Dropbox Fluid Check Procedure
34
Keeping Fluid Clean
35
Recommended Automatic Transmission Fluid and Viscosity Grade Non-MT 643R Transmissions
35
MT 643R Transmissions
36
Fluid and Filter Change Intervals
37
Fluid Contamination
38
Auxiliary Filter
40
Customer Service
41
Owner Assistance
41
Service Literature
43
Allison Transmission Distributors
44
Allison Transmission Regional Offices
47
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Allison Transmission MT 644 Specifications
General
Brand
Allison Transmission
Model
MT 644
Category
Microphone system
Language
English
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