DOB 1300-1556| X3-45 Commuter PA-1648 Maintenance Manual Section 23 revised Nov 2021
8. SNOW CHAIN SYSTEM
The vehicle is equipped with a driver activated
snow chain system that will deploy under the
drive wheels to provide added traction on ice
and snow.
To ensure optimal performance, a regular
inspection of the system components must be
performed and wearable parts replaced as
required.
8.1 PREVENTIVE INSPECTION AND
MAINTENANCE
MAINTENANCE
Snow Chain System
Inspect and replace components at intervals
specified by the Lubri
cation And Servicing
Schedule in Section 24: LUBRICATION &
SERVICING.
Do not exceed recommended service intervals.
1. Inspect all parts for damage or excessive
rust.
2. Check all fasteners for correct torque (refer
to the torque table at the beginning of this
section).
3. Check air lines, valves and solenoids for leak
when the system is engaged.
4. Inspect contact ring rubber and chain strands
for wear.
• Replace wheel assembly when rubber
ring indicators are fading out or if the
wheel bearing is not spinning freely
(FIGURE 30).
• Replace wheel assembly when any of
the chain strands reach 0.130in
(3.25mm) in diameter (equivalent to
50% wear FIGURE 31)
5. Inspect inside sidewall of the tires. Tire wear
indicates misalignment or damage to the
system.
FIGURE 30: WEAR INDICATORS ON RUBBER CONTACT
RING
FIGURE 31: CHAIN STRAND MIN DIAMETER 0.130”
6. Check for proper chain wheel angle and
position in relation to the vertical centerline of
the tire (see 8.2 POSITIONING
REQUIREMENTS).
7. To keep the system in good working order,
carry out the swiveling action once a week.
This can be done with the vehicle in a
stationary position by one of these ways:
• Pressing on the button located on top of
the system valve in the front pneumatic
compartment (this will bypass the
electrical activation system as shown in
FIGURE 32).
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