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Meritor 17X Maintenance Manual

Single reduction differential carrier
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Maintenance Manual MM-0700
Single Reduction Differential Carrier
17X
Revised August 2017

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Summary of Contents for Meritor 17X

  • Page 1 Maintenance Manual MM-0700 Single Reduction Differential Carrier Revised August 2017...
  • Page 2 MERITOR. MERITOR reserves the right to publish revisions at any time for technical or Meritor uses the following notations to alert the user of possible commercial purposes.

  • Page 3: Table Of Contents

    MST4714 - Adj. Ring Wrench Assy R.H. Disassembly Assembly 47 Section 5: Differential Lock Removal Differential Lock Removal 49 Section 6: Tightening Torque Values & Lubrication Torque values Tightening Torque Table 53 Section 7: Troubleshooting Troubleshooting Chart Meritor Differential Carrier 17X...
  • Page 4 Operator: Further information on warranty conditions may be obtained Any person who will use the Single Reduction Differential Carrier directly from the manufacturer or by referring to the Meritor web as part of a more complex device. site www.meritor.com Meritor Differential Carrier 17X...

  • Page 5: Section 1: Introduction

    Introduction Specification & Data Exploded View Exploded View Parts List Section View Section View Parts List Meritor Differential Carrier 17X...
  • Page 6 The differential assembly drive gear welded is supported on two taper roller bearings and is adjusted for end play through two threaded ring nut adjusters. Meritor Differential Carrier 17X...
  • Page 7 Pinion Bearing Preload 0.50 - 10 Nm without Pinion Seal * Verify with the Engineering reference the range of the ratio in current production because sometimes some ratios could be already released but not currently in production. Meritor Differential Carrier 17X...
  • Page 8 1 Introduction Exploded view Fig. 1.1 Meritor Differential Carrier 17X...
  • Page 9 Identification Plate 10b Inner Pinion Bearing Cone Spacer (Variable) Shim - Inner Pinion Bearing Cup (0.10mm) Shim - Inner Pinion Bearing Cup (0.15mm) Shim - Inner Pinion Bearing Cup (0.20mm) Shim - Inner Pinion Bearing Cup (0.50mm) Meritor Differential Carrier 17X...
  • Page 10 1 Introduction Section view Right Bearing Cap Left Bearing Cap Fig. 1B Meritor Differential Carrier 17X...
  • Page 11 Pinion Seal Outer Pinion Bearing Spacer (variable) Diff Carrier Shim (variable) Inner Pinion Bearing Drive Pinion Spigot Bearing Bearing Cap LH Bearing Cap Screw Bearing Cap RH Differential Gear Set Assembly Sensor Switch Locknut - Sensor Switch Meritor Differential Carrier 17X...
  • Page 12 Meritor Differential Carrier 17X...

  • Page 13: Section 2: Maintenance

    Checking the Rear Axle Housing Ring Gear & Pinion Adjustment Shim Pack Calculation Carrier Assembly Calculating the Preload Spacer Adjust Differential Bearings Preload Tooth Contact Patterns & Hypoid Gear Set Installation & Adjustment of the Diff Lock Sensor Switch Meritor Differential Carrier 17X...
  • Page 14 (Fig.2.1a) Ensure the continuous bead of sealant is applied Spare parts around the slots in the mounting face to achieve correct Use original Meritor spare parts only. sealing. DO NOT apply the sealant over the slots (Fig 2.1a). Differential removal and installation 1.

  • Page 15: Ring Gear & Pinion Adjustment

    If the tool is not available press the bearing with 1.000 N or 100 kg load and take measurement in three points - about 120 degrees. Only original Meritor spare parts should be used. Use of non-original parts could seriously affect differential Measure the internal distance between the service tool plates at unit performance.

  • Page 16: Shim Pack Calculation

    1.1 The standard theoretical pinion mounting dimension F is 235mm 1.2 Note the Pinion Cone (P.C.) value H marked on the drive ring gear (Fig. 2.6). This can be either a + value or - value, (e.g. + 0.10mm) Fig. 2.6.c Meritor Differential Carrier 17X...
  • Page 17 2 Maintenance Refer to the following examples which cover all the possible calculation combinations. NOTE : All values are mm. Example 1: Original Shim Pack Thickness 0.76 H marked on the OLD DRIVE GEAR (-0.10) -0.10 Resulting Value 0.66 H marked on the NEW DRIVE GEAR (-0.12) +0.12 Thickness of new shim pack required 0.78...

  • Page 18: Carrier Assembly

    Manufacturer’s Adjusted Shim Pack value which is 0,5 mm for the 17X carrier. Check tooth contact pattern and adjust the shim pack thickness as necessary to achieve the correct contact pattern.
  • Page 19 When under cutting of the pinion nose is present it may be necessary to adjust the position of the staking points to ensure they avoid any undercut; in this case a minimum of Fig. 2.14 5 staking points are required. Meritor Differential Carrier 17X...
  • Page 20 (Fig.2.16). Apply a press load of Press the bearing until is squarely against the shoulder in the 6 - 8 tons. bottom of its bore (Fig.2.18). Assembly Oil CT43 Fig. 2.15 Fig. 2.17 CT44 Fig. 2.16 Fig. 2.18 Meritor Differential Carrier 17X...
  • Page 21 (Fig.2.22). Apply a press load of 6 - 8 tons. Fig. 2.19 Fig. 2.21 Outer Shims Shims Inner Fig. 2.20 Fig. 2.22 Meritor Differential Carrier 17X...

  • Page 22: Calculating The Preload Spacer

    10. Fit the input flange into position and tighten the pinion nut to a torque value of 1350 - 1670Nm NOTE : Do not use a standard flange and pinion nut for this operation. Use a set up pinion nut. Meritor Differential Carrier 17X...
  • Page 23 Wooden Block bearing cone of the pinion shaft once more against the Pinion Head Support spacer/s (Fig.2.28) using a press load of 6 - 8 ton. Rotate the Fig. 2.27 pinion by hand to seat the bearings. Meritor Differential Carrier 17X...
  • Page 24 18. Fit the flange and tighten the pinion nut to a torque value of 1350 - 1670Nm. NOTE : The flange must be fully seated against the outer pinion 0,5-10 Nm Preload bearing before the nut is tightened to the torque specification. Without Pinion Seal Fig. 2.30 Meritor Differential Carrier 17X...
  • Page 25 / CT47-R.H.). Press the cones squarely and firmly on differential cases with a press force of 6 - 8 tons. NOTE : The larger bearing is fitted to the drive gear side of the ring gear. Fig. 2.31 Fig. 2.32 Fig. 2.33 Fig. 2.34 Meritor Differential Carrier 17X...
  • Page 26 (Fig.2.36). Fit the cap into position on the Differential (Fig.2.37). Fig. 2.37 Fig. 2.35 Fig. 2.38 22. Safely lift the differential with ring gear, cup, R.H. cap and adjusting ring assembly (Fig.2.38) using a suitable tool (CT52). Fig. 2.36 Meritor Differential Carrier 17X...
  • Page 27 (Fig.2.41). Tighten all the cap screws by hand four to holes (Fig.2.40). six turns, then tighten to the correct torque value 200Nm+ 90°-105°. Fig. 2.39 Fig. 2.41 25. Fit the L.H. split cap with a light plastic or rubber mallet (Fig.2.42). Fig. 2.40 Fig. 2.42 Meritor Differential Carrier 17X...

  • Page 28: Adjust Differential Bearings Preload

    Fig. 2.45 Adjust Differential Bearings Preload 1. Fit two dial indicators according to the above scheme on “X” or “Y” axis against the wing’s caps and set in the ZERO position. Fig.2.46 Fig. 2.44 Fig. 2.46 Meritor Differential Carrier 17X...
  • Page 29 3, max 4 notches from cap’s mark. Fig. 2.49 “Zero” Preload Fig. 2.48 Fig. 2.47 3-4 Notches Fig. 2.49 Fig. 2.50 * Adjusting rings could differ from original shape for clarity. NOTE: Differential Bearing Cap (X or Y) Divergence = 0.15 - 0.33 mm Meritor Differential Carrier 17X...
  • Page 30 7. Check the gear for run out (Fig.2.54). If run out exceeds 0.20 NOTE : Adjust the backlash by moving the gear only. mm, remove the differential and check for the cause. Fig. 2.51 Fig. 2.53 Fig. 2.52 Fig. 2.54 Meritor Differential Carrier 17X...

  • Page 31: Tooth Contact Patterns & Hypoid Gear Set

    (Fig.2.59). Tighten the screws to the correct torque value 10-12 Nm. Drive (convex side) Heel 1 - Coast 2 - Toe 4 - Heel 3 - Drive Fig. 2.59 Fig. 2.56 Meritor Differential Carrier 17X...
  • Page 32 1. Coat the shift fork slanting face with Molikote Gn Plus grease (Fig.2.60). 2. Install the shift fork into position in the carrier case with the protruding boss facing towards the outer bore in the differential lock housing (Fig.2.61). Fig. 2.61 Meritor Differential Carrier 17X...
  • Page 33 3. Compress the shift shaft spring (650 N. or 65 Kg force) using 4. While the spring is compressed insert it into a service tool a Meritor suitable service tool MST4708 - CT48 MST4211 - CT07 and remove from the spring compression (Figs.2.62 &...
  • Page 34 Fig. 2.66 Fig. 2.69 Fig. 2.67 6. With a Meritor suitable service tool MST4709 - CT49, or a suitable screwdriver locate the spring correctly between the two shift shaft bores into the carrier casting (Fig.2.68). 7. Whilst holding and tilting the shift fork, place the shift collar in position in the fork (Fig.
  • Page 35 The old Piston&Push-rod and the new Push-rod are Generously lubricate the 'O' ring, piston (Fig.2.73) with interchangeable. Molikote 44 grease and carefully insert the piston into the cylinder bore (Fig.2.74). Fig. 2.71 Fig. 2.73 Fig. 2.72 Fig. 2.74 * Single version Fig. 2.75 Meritor Differential Carrier 17X...
  • Page 36 1. Before fitting the switch, coat the switch point with MoliKote GN Plus grease. Apply Loctite 573 sealant to the threads (Fig. 2.78) and carefully screw the switch into the differential casing approx. 3 threads (Fig. 2.79). Fig. 2.76 Fig. 2.78 Fig. 2.77 Fig. 2.79 Meritor Differential Carrier 17X...
  • Page 37 5. Release the differential lock and ensure that in this condition the warning lamp in the cab is off. 6. Repeat the above operations several times before running on the road. Fig. 2.80 Fig. 2.81 Meritor Differential Carrier 17X...
  • Page 38 Meritor Differential Carrier 17X...

  • Page 39: Hypoid Gear Pattern Tables

    Hypoid Gear Contact Patterns Hypoid Gear Pattern Tables Meritor Differential Carrier 17X...
  • Page 40 : Check the Backlash, ADD Shims and re-set the Backlash CONDITION “C” HEEL HEEL BOTTOM BOTTOM • DRIVE-COAST SIDE : Contact too close to the BOTTOM • CORRECTIVE ACTIONS : Check the Backlash, REDUCE Shims and re-set the Backlash. Meritor Differential Carrier 17X...
  • Page 41 : Contact too close to the TOE. • COAST SIDE : Contact too close to the HEEL. • CORRECTIVE ACTIONS : Increase the backlash. : The Contact patterens reported are always on the RING GEAR TEETH. NOTE Meritor Differential Carrier 17X...
  • Page 42 Meritor Differential Carrier 17X...

  • Page 43: Section 4: Pinion Seal Replacement

    Pinion Seal Replacement Disassembly Assembly Meritor Differential Carrier 17X...

  • Page 44: Disassembly

    6. Pry with two levers (2) to withdraw the inner ring (1). (Fig. 4.4) 7. Pry with the lever in the direction shown by the arrow to remove the grommet (1). (Fig. 4.5) Fig. 4.4 Fig. 4.2 Fig. 4.3 Fig. 4.5 Meritor Differential Carrier 17X...

  • Page 45: Assembly

    2. Position a new pinion seal ring (1). Fit the suitable service tool (CT01) (2). 3. Using a Meritor suitable set-up pinion nut tighten the pinion nut until the new pinion seal is fully located in the carrier (Fig. 4.6) 4.
  • Page 46 Meritor Differential Carrier 17X...

  • Page 47: Section 5: Differential Lock Removal

    Differential Lock Removal Differential Lock Removal Meritor Differential Carrier 17X...
  • Page 48 If there is a doubt in the suitability of any component for further service, replace with new Meritor service parts. 1. Remove the carrier assembly from the vehicle as described in Section 2, Maintenance and mount securely in a suitable 12.

  • Page 49: Section 6: Tightening Torque Values & Lubrication

    Tightening Torque Values & Lubrication Torque values Tightening Torque Table Meritor Differential Carrier 17X...
  • Page 50 6 Tightening Torque Values & Lubrication Left Right Bearing Cap Bearing Cap Fig. 6.1 Meritor Differential Carrier 17X...
  • Page 51 *** Apply sealant Loctite 573 to the threads if removed. Lubrication Oil Specification Oil Capacity Hypoid Gear Oil MS 17X = 12.5 ± 0.5 Litres • S.A.E. J2360 - GL5 - tested and approved (see also TP0460) Meritor Differential Carrier 17X...
  • Page 52 Meritor Differential Carrier 17X...

  • Page 53: Section 7: Troubleshooting

    Troubleshooting Troubleshooting Chart Meritor Differential Carrier 17X...
  • Page 54 Clean threads, coat with sealant if necessary, and tighten to the specified torque Seal between axle housing and differential unit Remove differential unit, check and clean all is damaged sealing surfaces and coat parts concerned with sealant, as required Meritor Differential Carrier 17X...

  • Page 55: Section 8: Service Tools

    CT50 - Pinion Spacer Pre-Set Nut Tool CT51 - Pinion Spacer Pre-Set Nut Flange CT52 - Diff. Crown Wheel lifting Tool CT53 - Punch-Tool (Axle Shaft) MST4713 - Adj. Ring Wrench Assy L.H. MST4714 - Adj. Ring Wrench Assy R.H. Meritor Differential Carrier 17X...
  • Page 56 8 Service Tools CT01 - Pinion Pac Oil Seal keying Tool Fig. 8.1 Meritor Differential Carrier 17X...

  • Page 57: Ct03 - Input Flange Wrench

    8 Service Tools CT03 - Input Flange Wrench Fig. 8.2 Meritor Differential Carrier 17X...

  • Page 58: Ct05 - Spigot Bearing Keying Tool

    8 Service Tools CT05 - Spigot Bearing keying Tool Fig. 8.3 Meritor Differential Carrier 17X...

  • Page 59: Ct06 - Spigot Bearing Pinion Keying Tool Punch

    8 Service Tools CT06 - Spigot Bearing Pinion keying Tool Punch Fig. 8.4 Meritor Differential Carrier 17X...

  • Page 60: Ct12 - Adjusting Ring Wrench

    8 Service Tools CT12 - Adjusting Ring Wrench Fig. 8.5 Meritor Differential Carrier 17X...

  • Page 61: Ct40 - Inner Pinion Bearing Measuring Tool

    8 Service Tools CT40 - Inner Pinion Bearing measuring Tool Fig. 8.6 Meritor Differential Carrier 17X...

  • Page 62: Ct42 - Inner Bearing Cup Tool

    8 Service Tools CT42 - Inner Bearing Cup Tool Fig. 8.7 Meritor Differential Carrier 17X...

  • Page 63: Ct43 - Outer Bearing Cup Tool

    8 Service Tools CT43 - Outer Bearing Cup Tool Fig. 8.8 Meritor Differential Carrier 17X...

  • Page 64: Ct44 - Inner Bearing Cone Tool

    8 Service Tools CT44 - Inner Bearing Cone Tool Fig. 8.9 Meritor Differential Carrier 17X...

  • Page 65: Ct45 - Outer Bearing Cone Tool

    8 Service Tools CT45 - Outer Bearing Cone Tool Fig. 8.10 Meritor Differential Carrier 17X...

  • Page 66: Ct46 - Diff. Bearing Cone L/H Tool

    8 Service Tools CT46 - Diff. Bearing Cone L/H Tool Fig. 8.11 Meritor Differential Carrier 17X...

  • Page 67: Ct47 - Diff. Bearing Cone R/H Tool

    8 Service Tools CT47 - Diff. Bearing Cone R/H Tool Fig. 8.12 Meritor Differential Carrier 17X...

  • Page 68: Ct48 - Diff. Lock Spring Compression Tool

    8 Service Tools CT48 - Diff. Lock Spring compression Tool Fig. 8.13 Meritor Differential Carrier 17X...

  • Page 69: Ct49 - Diff. Lock Spring Fitting Tool

    8 Service Tools CT49 - Diff. Lock Spring fitting Tool Fig. 8.14 Meritor Differential Carrier 17X...

  • Page 70: Ct50 - Pinion Spacer Pre-Set Nut Tool

    8 Service Tools CT50 - Pinion Spacer Pre-Set Nut Tool Fig. 8.15 Meritor Differential Carrier 17X...

  • Page 71: Ct51 - Pinion Spacer Pre-Set Nut Flange

    8 Service Tools CT51 - Pinion Spacer Pre-Set Nut Flange Fig. 8.16 Meritor Differential Carrier 17X...

  • Page 72: Ct52 - Diff. Crown Wheel Lifting Tool

    8 Service Tools CT52 - Diff. Crown Wheel lifting Tool Fig. 8.17 Meritor Differential Carrier 17X...

  • Page 73: Ct53 - Punch-Tool (Axle Shaft)

    8 Service Tools CT53 - Punch-Tool (Axle Shaft) Fig. 8.18 Meritor Differential Carrier 17X...

  • Page 74: Mst4713 - Adj. Ring Wrench Assy L.h

    8 Service Tools MST4713 - Adj. Ring Wrench Assy L.H. Fig. 8.19 Meritor Differential Carrier 17X...

  • Page 75: Mst4714 - Adj. Ring Wrench Assy R.h

    8 Service Tools MST4714 - Adj. Ring Wrench Assy R.H. Fig. 8.20 Meritor Differential Carrier 17X...
  • Page 76 Meritor HVS Cameri S.p.A. Strada Prov. Cameri-Bellinzago km. 5 Printed in Italy 28062 Cameri (NO), Italy Tel.: +39 0321 4231 Revised August 2017 Fax: +39 0321 423424 www.meritor.com © Meritor 2012 M-graph - MM0700...

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