Copyright Meritor, Inc., 2021
MM-96147 / Revised 03-21
Page 76
(16579)
Printed in USA
14 Measuring and Recording Driveline Angles
Meauring and Recording
Driveline Angles
Special Tools
Tools You’ll Need
• An inclinometer or a spirit level protractor to measure
driveline angles. Figure 14.1 and Figure 14.2.
Fig. 14.1
0
15
30
45
60
75
90
75
60
45
30
15
0
15 30
45
60
75
90
75
60
45
30
15
Fig. 14.2
• A tape measure to measure ride height for air-ride-
equipped tractors
• A Data Gathering Worksheet. Photocopy one of the several
Data Gathering Worksheets provided at the end of this
manual. You will use this photocopy to record the tractor’s
specifi cations and driveline angle measurements. Refer
to the Service Notes page on the front inside cover of this
manual for information on how to obtain additional Data
Gathering Worksheets.
Overview
Prepare the Vehicle
DANGER
Park the vehicle on a level surface. Block the wheels to prevent
the vehicle from moving. Support the vehicle with safety stands.
NEVER work under a vehicle supported only by jacks. Jacks can
slip and fall over. Failure to use a jack stand can result in serious
personal injury and damage to components.
WARNING
To prevent eye injury, always wear eye protection when
performing vehicle maintenance or service.
1. Park the vehicle on a level surface. Do not engage the tractor
brakes or the parking brakes.
2. Verify that all tires are on a level surface and infl ated to the
specifi ed pressure.
3. Block the front tires at both the front and rear.
For Air-Ride-Equipped Tractors
1. Build air pressure to at least 115 psi (792.35 kPa).
2. Defl ate air from the air bags: Use the dash-mounted defl ate
switch or release air pressure through the air valve at the rear
of the tractor.
3. Allow the air bags to infl ate completely.
4. Measure ride height with a tape measure. If necessary,
adjust ride height to the correct vehicle manufacturer’s
specifi cations.
Data Gathering Worksheet
General Information Section
NOTE:
Worksheets can be located at the end of this manual.
There are individual data gathering sheets for each of the following
driveline confi gurations:
• One-piece driveline, single rear axle
• One-piece driveline, tandem rear axle
• Two-piece driveline, single rear axle
• Two-piece driveline, tandem rear axle
