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Allison Transmission AT 500 Series User Manual

Allison Transmission AT 500 Series
52 pages
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MT1321EN
MT4108EN
Mechanic’s Tips
AT 500 and AT 1500
Series Transmissions

Table of Contents

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Allison Transmission AT 500 Series Specifications

General IconGeneral
BrandAllison Transmission
ModelAT 500 Series
CategoryMicrophone system
LanguageEnglish

Summary

Preventive Maintenance and Fluid Management

Periodic Inspection and Care

Inspect transmission for loose bolts, fluid leaks, linkage, vacuum leaks, and fluid lines.

Fluid Check Procedure

Detailed steps for performing cold and hot transmission fluid level checks.

Fluid and Filter Change Procedure

Procedure for draining, refilling transmission fluid, and changing filters.

Fluid Contamination

Identifying and addressing dirt, metal particles, or coolant in transmission fluid.

Transmission Stall Test and Neutral Cool-Down Check

Diagnostic procedures for checking transmission performance and fluid cooling.

Transmission Removal Procedures

Draining Transmission

Procedure for draining transmission fluid before removal.

Disconnecting Controls

Steps to disconnect all linkage, cables, and hoses from the transmission.

Uncoupling Engine from Driveline

Procedure for separating the transmission from the engine's driveline.

Removing Transmission

Physical steps to remove the transmission from the vehicle.

Transmission Installation Preparation and Execution

Checking Input Components

Inspect flywheel, flexplate, pilot boss, and mounting flanges for damage.

Checking Torque Converter Position

Verify correct axial positioning of the torque converter against the flexplate.

Installing Transmission into Vehicle

Guidance for handling, coupling to engine, and connecting driveline.

Connecting Cooler, Vacuum Lines, Air Lines

Connecting transmission cooling and control lines.

Installing, Adjusting Mechanical Modulator Control

Procedure for installing and adjusting the mechanical modulator control.

Post-Installation Checks and Adjustments

Installation Checklist

Checklist for proper torque values on all installed components.

Road Test and Vehicle Operation Checklist

Checklist for vehicle operation, including neutral start, instruments, brakes, PTO, and shifts.

Customer Support and Literature

Owner Assistance

Details on obtaining expert service, parts, and product information.

Service Literature

List of available service manuals, parts catalogs, and operator manuals.

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