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Maintenance Manual 14R

RideSentry™ MPA Series Sliding Tandem
Trailer Air Suspension System

Revised 12-18

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Summary of Contents for RideSentry MPA Series

Page 1: ...Maintenance Manual 14R RideSentry MPA Series Sliding Tandem Trailer Air Suspension System Revised 12 18...

Page 2: ...al injury damage to components or both 3 Follow your company s maintenance and service installation and diagnostics guidelines 4 Use special tools when required to help avoid serious personal injury a...

Page 3: ...t Maintain the Correct Ride Height When You Change an HCV 12 Removal and Installation Air Spring 14 Upper Control Arm 17 Lower Control Arm Axle Replacement Procedure 19 Axle Alignment Before You Align...

Page 4: ...4 Slider Side Rail Curbside 5 Air Spring 6 Lower Control Arm Fixed 7 Lower Bushing 8 Lower Inner Sleeve Bushing Inner Metal 9 Upper Axle Seat 10 Upper Control Arm 11 Lower Axle Seat 12 Upper Bushing...

Page 5: ...are parallel to each other The air springs mount directly over the axle Figure 2 1 Ride height and mounting height are important measurements for overall vehicle height Measure ride height from the c...

Page 6: ...r under the air spring 18 5 inch ride height has two 1 0 inch spacers under the air spring Components Frame brackets and slider assembly Upper and lower control arms Axle assemblies Air springs Shock...

Page 7: ...Capacity Nominal Ride Height Model Number Serial Number FOR SUSPENSION NOMINAL RIDE HEIGHT NRH REFERTOTHE NRH VALUE INDICATED ONTHIS LABEL FORTHE ACTUAL RIDE HEIGHT VALUE REFERTOTHE VEHICLE TRAILER MA...

Page 8: ...e system Listen for air leaks After 1 000 Miles 1600 km and Annually Thereafter 1 Visually inspect all fasteners for looseness or movement Figure 3 1 Ensure loose fasteners have not caused damage to a...

Page 9: ...nd 6 Lower Control Arm Adjustable Axle End 7 Lower Control Arm Adjustable Frame Bracket End 8 Lower Control Arm Adjustable Clamp Bolt 9 Upper Air Spring Nut 3 4 16 NF 10 Upper Air Spring Nut 1 2 13 NC...

Page 10: ...ecifications 2 Check the slider locking pins and slider wear pads for signs of excessive wear or binding Figure 3 2 Repair or replace as needed 3 Inspect the structure of the slider box and crossmembe...

Page 11: ...spect the structure of the suspension Figure 3 3 Inspect the following items Upper axle seats Upper control arms Lower axle seats Lower control arms Axle welds Brake interference cam or chamber Frame...

Page 12: ...livery ports 8 Connect the air lines to the height control valve and repeat the above steps If air still does not flow to and from the air springs or if the airflow cannot be stopped in the neutral po...

Page 13: ...wheels to prevent the vehicle from moving 2 Drain all the air from the surge tank and air springs 3 Remove the air supply and delivery lines from the height control valve 4 Disconnect the linkage Rep...

Page 14: ...k the ride height Figure 4 5 Repeat the previous step until the measured ride height matches the trailer manufacturer s specified ride height Figure 4 5 6 Use a 3 8 inch wrench to loosen the 0 25 inch...

Page 15: ...at is damaged or leaking air 2 Park the trailer on a level surface Block the tires to prevent the trailer from moving 3 Use an appropriate lifting device to raise the trailer to extend the air springs...

Page 16: ...25 lb ft 30 35 N m Tighten the 3 4 16 UNF nut to 45 50 lb ft 60 70 N m 13 Install the fitting and inlet air line to the top of the air spring Apply a sealant tape 14 Seat the valve at the bottom of th...

Page 17: ...afety stands Set the parking brake 2 Exhaust the air pressure from the suspension air springs Remove the wheels from the axle where you are removing the bushings to access the pivot bolts If there is...

Page 18: ...flat washer onto the draw bolt until it sets against the bushing Figure 4 13 11 Snug the draw bolt while ensuring that the bushing and draw plate rest securely on the upper control arm bushing tube 1...

Page 19: ...the bushings 20 Remove the bushings Remove any burrs and clean the inside diameter of the upper control arm ends Figure 4 9 21 Repeat Steps 7 15 to install the bushing 22 Position the upper control ar...

Page 20: ...m ends Insert the inner sleeve through the bushings Use light mineral oil Meritor specification O 92 B for lubrication Center the inner sleeve in the lower control arm ends 8 Position the lower contro...

Page 21: ...the upper control arm bushings Figure 4 19 17 Install the axle onto the upper control arm Install the new pivot bolts and nuts but do not tighten at this time Figure 4 20 18 Install the lower control...

Page 22: ...same side of the body rail holes front or rear Front Axle 1 Verify that the suspension is at the correct ride height Refer to the trailer manufacturer s specifications Figure 4 16 2 Measure from the...

Page 23: ...ailer applications may require automatic dump of the suspension when the glad hands are disconnected from the trailer The suspension is equipped with the 1500 Series HCV Figure 4 22 The HCV s automati...

Page 24: ...you weld to any suspension components To obtain this publication refer to the Service Notes page on the front inside cover of this manual Suspension WARNING Do not weld on the upper control arm Weldi...

Page 25: ...ough the body rails on both sides of the trailer The stationary stop bar at the rear of the trailer must be perpendicular to the body rails The measurement from the rear of the slider to the center of...

Page 26: ...il the sliding suspension is at the desired location Do not exceed 3 mph 4 Pull the control valve knob OUT to reset the lock pins Check that the suspension is locked securely The main body of each loc...

Page 27: ...backward and forward to ensure that the suspension is secure To Correctly Reposition the Sliding Suspension 1 Set both the tractor and trailer brakes Remove the locator stop bar if the option is avail...

Page 28: ...suspension is overloaded Reduce the load to the suspension rated capacity There is a hole or tear in the air spring Check for the correct clearance and determine the cause of the air spring damage Aft...

Page 29: ...ngs The tire clearance is incorrect in full jounce The tire size is incorrect Replace the tires with the recommended tire size Contact the original equipment manufacturer for tire size specifications...

Page 30: ...asteners Replace damaged fasteners to maintain correct torque values and comply with warranty requirements Torque Specifications Fasteners lb ft N m Upper Control Arm All Pivot Connections 450 500 611...

Page 31: ...al Tools Tool Drawing The bushing tool part number A 3256 H 1152 consists of the following components Figure 9 1 Draw plate Draw bolt Two flat washers Draw nut Figure 9 1 Figure 9 1 4005081a FLAT WASH...

Page 32: ...Meritor Heavy Vehicle Systems LLC 2135 West Maple Road Printed in USA Troy MI 48084 USA 866 OnTrac1 668 7221 Copyright 2018 Revised 12 18 meritor com Meritor Inc Maintenance Manual 14R 16579...

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