MI18-45A

MAINTENANCE
INFORMATION
Revision: A
MI18-45A
DATE :
November 2018
SUBJECT :
Tie Rod 610052; Front I-beam Axle
General revision.
SECTION : 10 FRONT AXLE
2019-06-07
APPLICATION
Model
All Prevost
Model Year: 1994 - 2019
VIN
Vehicles with I-beam axle S-84 / S-84U
DESCRIPTION
Vehicles identified above are compatible with a new tie rod design. This new tie rod 610052 has
updated ball joints and a fine adjuster sleeve. It replaces former drop type ball joint tie rods.
Refer to IS-18091 for installation instructions.
This document details maintenance inspection and toe-in adjustment with the new design tie
rod.
FIGURE 1: 610052 TIE ROD
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TABLE OF CONTENTS
MAINTENANCE INSPECTION ..................................................................................................................... 3
COMPONENT OVERVIEW ....................................................................................................................... 3
TUBE INSPECTION .................................................................................................................................. 3
BALL JOINT INSPECTION ........................................................................................................................ 4
FINE ADJUSTMENT SLEEVE INSPECTION ........................................................................................... 5
BALL JOINT INSPECTION FOR CORROSION ........................................................................................ 5
TOE IN ADJUSTMENT .............................................................................................................................. 6
TORQUE REFERENCE ................................................................................................................................ 6
MATERIAL
This Maintenance Information pertains to Kit IS18091 which includes the following parts:
Part No.
Description
Qty
610052
TIE ROD ASSY
1
610051
NUT HEX SELF LOCKING M24-1.5 (Single use)
2
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MAINTENANCE INSPECTION PROCEDURES
MAINTENANCE
Inspect tie rod once a year.
DANGER
Park vehicle safely, apply parking brake, stop engine. Prior to working on the vehicle, set the ignition
switch to the OFF position and trip the main circuit breakers equipped with a trip button. On Commuter
type vehicles, set the battery master switch (master cut-out) to the OFF position.
COMPONENT OVERVIEW
The tie rod features a fine adjustment piece on one side and a standard joint on the other side.
FIGURE 2: TIE ROD COMPONENTS
The steering tie rod requires several visual and functional verifications. If any of the conditions are found,
a complete replacement of the tie rod assembly or individual parts may be required.
For additional details, refer to supplier information:
TRW_Front_Axle_Steering_Bar_Service_Information_XSZ143 available on the Prevost Technical
publications website.
TUBE INSPECTION
Check the tube for damage. If there are signs of deformation, replace the tie rod assembly.
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BALL JOINT INSPECTION
To inspect joint wear and play, turn the
wheels alternately left and right until
the wheels move. Perform this with the
axle loaded normally. Replace the joint
if the movement of the ball stud
exceeds 0.5mm axially in the housing.
FIGURE 3 TIE ROD BALL JOINT CONSTRUCTION
Measure the distance with a caliper
(Figure 4).
FIGURE 4: MEASURING AXIAL PLAY, TIE ROD JOINTS
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FINE ADJUSTMENT SLEEVE INSPECTION
Turn the wheels alternately left and right
while keeping a finger on the threads to
feel any movement in the threads
(Figure 5).
If there is too much play in the sleeve,
replace the tie rod.
FIGURE 5:FINE ADJUSTMENT SLEEVE INSPECTION
BALL JOINT INSPECTION FOR CORROSION
MAINTENANCE
Inspect tie rod ball joints for corrosion once a year.
FIGURE 6: TIE ROD BALL JOINT CONSTRUCTION
1. Carefully clean the sealing boot contact area to ensure that no contaminants can get under the sealing
bellows during the inspection procedure. Do not use cleaning agents or solvents, only use dry cloth or
cotton wool.
2. Housing: The housing must not show any signs of deep rusting (depth of no more than approx.
1mm). Pay particular attention to the roll edge and cover, they must be rust free.
Clean corrosion on the axle steering lever contact faces also.
3. Bellows: They must be in perfect condition to protect from corrosion. Squeeze the bellows by hand
and make sure no grease is expelled from the opening. Make sure the bellows is in good condition,
without any holes, tears, scratches of chafing marks. Replace the joint if inspection result is not OK.
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Tension rings and clamping rings must be well seated in their groove.
It must always be possible to turn the bellows on the housing by hand (do not use any tools). Hold the
bellows in the area of the clamping ring and turn with a lot of manual force. Replace the tie rod if the
result is not OK.
TOE IN ADJUSTMENT
Refer to the maintenance manual for your particular vehicle in Section 14-Steering under “Front Wheel
Toe-in”.
1. If the toe-in measurement is not within the manual’s specified tolerance, carry out the following
procedure :
a.
Loosen the pinch bolt on the right hand (curb side) tie rod end where the adjuster sleeve is
located.
b.
Turn the adjuster sleeve (Figure 7) until the specified toe-in measurement is obtained.
c.
Tighten the pinch bolt nuts
TORQUE: 107-129 lb-ft (145-175 Nm)
FIGURE 7: FINE ADJUSTER SLEEVE ON TIE ROD
TORQUE REFERENCE
(1) Tie rod joint self-locking nuts
155-170 lb-ft (210-230 Nm)
Note: Joint nuts are single use and should be
replaced every time they are unscrewed.
Order 610051 qty 2.
(2) Tie rod end clamp bolts
107-129 lb-ft (145-175 Nm)
FIGURE 8: 610052 TORQUE REFERENCE
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PARTS / WASTE DISPOSAL
Discard according to applicable environmental regulations (Municipal/State[Prov.]/ Federal)
Access all our Service Bulletins on http://techpub.prevostcar.com/en/
Or scan the QR-Code with your smart phone
.
Are you a Vehicle owner?
E-mail us at [email protected] and type “ADD” in the subject to
receive warranty bulletins applicable to your vehicle(s) by e-mail.
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