Meritor MX-120/MX-120HR Front Drive Steer Axle Parts Manual
MX-120 and MX-120HR
Item 41Item 42Item 46Item 43Item 47Item 44Item 38Item 48Item 45Item 35Item 34Item 32Item 28Item 33Item 49Item 27Item 29Item 50Item 24Item 26Item 23Item 40Item 38Item 31Item 39Item 25Item 22Item 30Item 21Item 37Item 19Item 20Item 36Item 17Item 18Item 16Item 15Item 12Item 10Item 51Item 51Item 2Item 3Item 4Item 5Item 6Item 7Item 8Item 11Item 7Click a number on the diagram to highlight that part below.
| Item | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 1 | 1227Z1378 | Wheel Nut | 20 | $54.52 | Add to Cart | |
| 2 | 3219N5942 | Brake Drum | 2 | $1,554.50 | Add to Cart | |
| 3 | S268P2 | Capscrews Cover Plate | 16 | $102.50 | Add to Cart | |
| 4 | 1229K1597P | Washers Cover Plate | 16 | $172.00 | Add to Cart | |
| 5 | 3266Z1456 | Cover Plate | 2 | $45.73 | Add to Cart | |
| 6 | 1229W4807 | Snap Ring Axle Shaft | 2 | $27.80 | Add to Cart | |
| 7 | 10X1594 | Capscrews Drive Flange | 16 | $69.40 | Add to Cart | |
| 8 | 1229U1503 | Washers Drive Flange | 16 | $113.00 | Add to Cart | |
| 9 | 3270R1084 | Drive Flange | 2 | $446.18 | Add to Cart | |
| 10 | 1227K1025 | Outer Adjusting Nut | 2 | $52.19 | Add to Cart | |
| 11 | R002560 | Lock Washer | 2 | $92.72 | Add to Cart | |
| 12 | 1227D1018 | Inner Adjusting Nut | 2 | $45.70 | Add to Cart | |
| 15 | A333R4230 | Hub Assembly | 2 | Available as Assembly Only.; Contains Items 14 17; , | $3,015.20 | Add to Cart |
| 16 | 20X2392 | Wheel Studs | 20 | Steel Wheels | $78.16 | Add to Cart |
| 16 | 20X2390 | Wheel Studs | 20 | Aluminum Wheels | $63.88 | Add to Cart |
| 17 | 52618 | Inner Bearing Cup | 2 | $60.66 | Add to Cart | |
| 18 | 52400 | Inner Bearing Cone | 2 | $162.89 | Add to Cart | |
| 19 | 3237V1062 | Abs Tone Ring | 2 | $373.77 | Add to Cart | |
| 20 | A1205P2434 | Grease Seal | 2 | $60.61 | Add to Cart | |
| 21 | S21020A2 | Capscrews Brake Assembly | 22 | $35.00 | Add to Cart | |
| 22 | 1229W1557 | Washers Brake Assembly | 22 | $34.00 | Add to Cart | |
| 23 | QP61655451 | Brake Assembly | 1 (LH) | MX-10/12-120 axles with MA212; (LH) | Call for availability | |
| 23 | QP61655452 | Brake Assembly | 1 (RH) | lining material See Figure 2 for; (RH); individual components | Call for availability | |
| 23 | QP61655449 | Brake Assembly | 1 (LH) | MX-14-120 axles with R301; (LH) | $1,226.96 | Add to Cart |
| 23 | QP61655450 | Brake Assembly | 1 (RH) | lining material See Figure 2 for; (RH); individual components | $1,226.96 | Add to Cart |
| 23 | QP61655729 | Brake Assembly | 1 (LH) | MX-10/12/14-120 axles with; (LH) | Call for availability | |
| 23 | QP61655730 | Brake Assembly | 1 (RH) | SOR610 lining material See; (RH); Figure 2 for individual components | Call for availability | |
| 23 | QP61656781 | Brake Assembly | 1 (LH) | MX-16-120 axles with R403; (LH) | Call for availability | |
| 23 | QP61656782 | Brake Assembly | 1 (RH) | lining material See Figure 2 for; (RH); individual components | Call for availability | |
| 23 | QP616561113 | Brake Assembly | 1 (LH) | MX-16-120 axles with R301; (LH) | $1,190.01 | Add to Cart |
| 23 | QP616561114 | Brake Assembly | 1 (RH) | lining material See Figure 2 for; (RH); individual components | $1,190.01 | Add to Cart |
| 24 | A1205V1556 | Camshaft Seal | 4 | $41.00 | Add to Cart | |
| 25 | 1225R1344 | Camshaft Bushing | 2 | $26.30 | Add to Cart | |
| 26 | 1229B1848 | Spacing Washer (Outer) | 6 | $144.00 | Add to Cart | |
| 27 | Automatic Slack Adjuster | 2 | See Figure 3 | Call for availability | ||
| 28 | 1229S2697 | Spacing Washer (Inner) | 2 | $70.50 | Add to Cart | |
| 29 | 1229X1116 | Camshaft Snap Ring | 2 | $143.00 | Add to Cart | |
| 30 | 1199T3166 | Wear Sleeve | 2 | $453.80 | Add to Cart | |
| 31 | A3213M1937 | Spindle Assembly | 2 | Available as Assembly only.; Contains Items 30 32 54; , , | $963.15 | Add to Cart |
| 32 | S1225S1189 | Abs Bushing | 2 | Call for availability |
Figure 1 (cont.)
| Item | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 33 | R955459 | Abs Clip | 2 | WS-24 style; only. | $10.55 | Add to Cart |
| 33 | 2237Q1005 | Abs Clip | 2 | ABS; Bendix WS-20; axles | Call for availability | |
| 34 | A3237Z1248 | Abs Sensor Assembly | 2 | ABS euipped | $467.09 | Add to Cart |
| 34 | WS24 | Abs Sensor Assembly | 2 | ABS euipped; Bendix; Bendix | Call for availability | |
| 34 | WS20 | Abs Sensor Assembly | 2 | sensor; style ABS | Call for availability | |
| 34 | A3237Z1196 | Abs Sensor Assembly | 2 | Call for availability | ||
| 34 | A2237B1328 | Abs Sensor Assembly | 2 | axles only | $76.54 | Add to Cart |
| 35 | A3111Z3874 | Steering Knuckle Assembly | 1 (LH) | in Contains; (LH); 1 1 -Z-3874 | $1,363.28 | Add to Cart |
| 35 | A311 | Steering Knuckle Assembly | 1 | -R-3684; replaces | Call for availability | |
| 35 | A3111 | Steering Knuckle Assembly | 1 | Call for availability | ||
| 35 | A3875 | Steering Knuckle Assembly | 1 | Call for availability | ||
| 35 | A3111A3875 | Steering Knuckle Assembly | 1 (RH) | replacing the; (RH) | $1,938.13 | Add to Cart |
| 35 | T3686 | Steering Knuckle Assembly | 1 | replacing the; (RH); both the LH; ,; ust be replaced | Call for availability | |
| 35 | A3111B3876 | Steering Knuckle Assembly | 1 (LH) | in Contains; (LH); 1 1 -B-3876 | No longer available - Call for replacement | |
| 35 | C3877 | Steering Knuckle Assembly | 1 | Call for availability | ||
| 35 | A3111C3877 | Steering Knuckle Assembly | 1 (RH) | If replacing the; (RH) | $1,148.18 | Add to Cart |
| 35 | W3689 | Steering Knuckle Assembly | 1 | If replacing the; (RH); both the LH; ,; ust be replaced | Call for availability | |
| 35a | 2803L3444 | Shim .005" | As | Available; As | $11.84 | Add to Cart |
| 35a | 2803M3445 | Shim .005" | reqd | Shim .015" | $12.88 | Add to Cart |
| 35a | KIT4760 | Shim .005" | As req. | Shim .015" | $35.91 | Add to Cart |
| 35a | 2803N3446 | Shim .005" | Shim .025" | $12.80 | Add to Cart | |
| 35b | 2237A1223 | Abs Cable Grom Met | 2 | Call for availability | ||
| 36 | S21214A2 | Capscrews Lower Knuckle Cap | 8 | $49.46 | Add to Cart | |
| 37 | 1229V1556 | Washers Lower Knuckle Cap | 8 | $36.30 | Add to Cart | |
| 38 | 1199B3226 | Grease Fitting | 6 | $88.80 | Add to Cart | |
| 39 | 3262G1255 | Lower Knuckle Cap | 2 | $804.51 | Add to Cart | |
| 40 | A1228X1220 | Thrust Bearing | 2 | $410.63 | Add to Cart | |
| 41 | S21424A2 | Capscrews Upper Knuckle Cap/ Steering Arm | 10 | Steering Arm | $33.68 | Add to Cart |
| 42 | 1229M1625 | Washers Upper Knuckle Cap/ Steering Arm | 10 | Steering Arm | $41.80 | Add to Cart |
| 43 | 3299X7148 | Chamber Bracket | 1 | $251.03 | Add to Cart | |
| 43 | 3299Y7149 | Chamber Bracket | 1 | $251.06 | Add to Cart | |
| 43 | 3299Q7349 | Chamber Bracket | 1 | offset clevis only | $483.66 | Add to Cart |
| 44 | Steering Arm | 1 | See Page 8 | Call for availability | ||
| 45 | 1205A1743 | Grease Seal Upper Cap/Steering Arm | 2 | $44.48 | Add to Cart | |
| 46 | NL2101 | Nut Air Brake Chamber | 4 | $91.80 | Add to Cart | |
| 47 | 1229U1503 | Washers Air Brake Chamber | 4 | $113.00 | Add to Cart | |
| 48 | A673276T20 | Air Brake Chamber | 2 | axles | $229.94 | Add to Cart |
| 48 | A883276X24 | Air Brake Chamber | 2 | $214.95 | Add to Cart | |
| 48 | MX16120 | Air Brake Chamber | 2 | axles | Call for availability | |
| 49 | 26X227 | Steering Stop Adjusting Screw | 2 | $385.70 | Add to Cart | |
| 50 | N391 | Steering Stop Adjusting Nut | 2 | $33.60 | Add to Cart | |
| 51 | R230068 | Tie Rod End | 1 (LH) | (LH) | $60.94 | Add to Cart |
| 51 | R230069 | Tie Rod End | 1 (RH) | (RH); 5 | $60.94 | Add to Cart |
| 52 | A3102Y3457 | Cross Tube W/ Clamps | 1 | KPI); For | No longer available - Call for replacement | |
| 52 | 1752M | Cross Tube W/ Clamps | 1 | KPI); Std Track m; OD) | Call for availability | |
| 52 | A3102Z3458 | Cross Tube W/ Clamps | 1 | KPI); For | $244.63 | Add to Cart |
| 52 | 1790M | Cross Tube W/ Clamps | 1 | KPI); Wide Track m; OD) | Call for availability | |
| 52 | A3102N3472 | Cross Tube W/ Clamps | 1 | KPI); For | $233.29 | Add to Cart |
| 52 | A3102G3465 | Cross Tube W/ Clamps | 1 | KPI); For | No longer available - Call for replacement | |
| 53 | A23102Y3457 | Tie Rod Assembly | 1 | KPI); For | $372.26 | Superseded by A23102K4379Add to Cart |
| 53 | 1752M | Tie Rod Assembly | 1 | KPI); Std Track m; OD) | Call for availability | |
| 53 | A23102Z3458 | Tie Rod Assembly | 1 | KPI); For | $841.77 | Add to Cart |
| 53 | 1790M | Tie Rod Assembly | 1 | KPI); Wide Track m; OD) | Call for availability | |
| 53 | A23102N3472 | Tie Rod Assembly | 1 | KPI); For | $333.28 | Add to Cart |
| 53 | A23102G3465 | Tie Rod Assembly | 1 | KPI); For | No longer available - Call for replacement | |
| 54 | 1225L1442 | Outer Axle Shaft Bushing | 1 | Replaces | $63.51 | Add to Cart |
| 54 | 1225G1333 | Outer Axle Shaft Bushing | 1 | $63.51 | Superseded by 1225L1442Add to Cart | |
| 55 | A1205V2648 | Grease Seal Axle Shaft | 2 | $60.42 | Add to Cart | |
| 56 | A3205W1115 | Axle Shaft Assembly LH | 1 | For | $2,214.23 | Add to Cart |
| 56 | 1752M | Axle Shaft Assembly LH | 1 | KPI 69 " m) | Call for availability | |
| 56 | A3205J1128 | Axle Shaft Assembly LH | 1 | For | $6,862.61 | Add to Cart |
| 56 | 1790M | Axle Shaft Assembly LH | 1 | KPI 70 .5" m) | Call for availability | |
| 57 | A1205U2647 | Oil Seal Axle Shaft | 2 | SEAL | $85.27 | Add to Cart |
| 58 | 1225L1442 | Inner Axle Shaft Bushing | 1 | Replaces | $63.51 | Add to Cart |
| 58 | 1225G1333 | Inner Axle Shaft Bushing | 1 | $63.51 | Superseded by 1225L1442Add to Cart | |
| 59 | Axle Housing Assembly | 1 | See Bill of Materials Contains; 1 1/03); 66 67 68; , , | Call for availability | ||
| 60 | 1225U1191 | King Pin Bushing | 4 | $71.24 | Add to Cart | |
| 61 | 1250V1218 | Socket Plug | 4 | $8.12 | Add to Cart | |
| 62 | 1250E473 | Lube Fill Plug | 1 | $16.72 | Add to Cart | |
| 63 | A1199W4053 | Breather Assembly | 1 | $175.80 | Add to Cart | |
| 64 | 1250E473 | Lube Drain Plug | 1 | $16.72 | Add to Cart | |
| 65 | 1246Z390 | Dowel Spring Plate | 1 | $54.24 | Add to Cart | |
| 66 | 3305S1449 | Spring Plate | 1 | Not | Call for availability | |
| 67 | 1229C1511 | Washer Spring Plate | 1 | housing | $141.00 | Add to Cart |
| 68 | S2812A2 | Capscrew Spring Plate | 1 | $2.74 | Superseded by S2812A1Add to Cart | |
| 69 | Carrier Assembly | 1 | See Bill of Materials | Call for availability | ||
| 70 | 1229C1511 | Washer Carrier Housing | 12 | $141.00 | Add to Cart | |
| 71 | 10X1602 | Capscrew (Short) Carrier Housing | 8 | $36.60 | Add to Cart | |
| 72 | 10X1603 | Capscrew (Long) Carrier Housing | 4 | $16.20 | Add to Cart | |
| 73 | Yoke | 1 | See Bill of Materials | Call for availability | ||
| 74 | 1229A2653 | Washer Yoke | 1 | $45.10 | Add to Cart | |
| 75 | 40X1236 | Nut Yoke | 1 | $40.41 | Add to Cart | |
| 76 | A3205X1116 | Axle Shaft Assembly RH | 1 | $2,055.28 | Add to Cart | |
| 77 | 3266A1457 | Upper Knuckle Cap | 1 | $772.52 | Add to Cart | |
| 1 | 2803L3444 | Shim .005" Knuckle End | 4 | -play. | $11.84 | Add to Cart |
| 2 | 2803M3445 | Shim .015" | 4 | $12.88 | Add to Cart | |
| 3 | 2803N3446 | Shim .025" | 4 | $12.80 | Add to Cart | |
| 4 | TP0690 | Instruction Sheet | 1 | Call for availability |
MX -120 and MX -120HR Brakes
Item 86Item 92Item 91Item 90Item 88Item 87Item 82Item 80Item 89Item 93Item 81Item 85Item 84Item 80Item 83Item 79Item 78Item 27Click a number on the diagram to highlight that part below.
| Item | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 78 | 2210E8585 | Camshaft | 1 | $77.02 | Add to Cart | |
| 78 | 2210D8584 | Camshaft | 1 | $77.02 | Add to Cart | |
| 79 | 1229X3118 | Washer | 1 | $90.00 | Add to Cart | |
| 80 | 1205Q2123 | Camshaft Seal | 2 | $56.60 | Add to Cart | |
| 81 | 1225B834 | Camshaft Bushing | 1 | $43.20 | Add to Cart | |
| 82 | 1229T4102 | Snap Ring | 1 | $87.00 | Add to Cart | |
| 83 | 1259N274 | Brake Shoe Anchor Pin | 2 | $32.04 | Add to Cart | |
| 84 | 1225B496 | Anchor Pin Bushing | 2 | $41.00 | Add to Cart | |
| 85 | 2258H1230 | Brake Shoe Retaining Spring | 2 | $41.40 | Add to Cart | |
| 86 | A223222Z2288 | Brake Shoe And Lining Assembly | 2 | $174.16 | Add to Cart | |
| 86 | MA212 | Brake Shoe And Lining Assembly | 2 | MX-10/12-120 axles with | Call for availability | |
| 86 | A43222Z2288 | Brake Shoe And Lining Assembly | 2 | $220.06 | Add to Cart | |
| 86 | MX14120 | Brake Shoe And Lining Assembly | 2 | axles with R301 lining | Call for availability | |
| 86 | A293222Z2288 | Brake Shoe And Lining Assembly | 2 | Call for availability | ||
| 86 | SOR610 | Brake Shoe And Lining Assembly | 2 | lining material Contains | Call for availability | |
| 86 | A83222P2200 | Brake Shoe And Lining Assembly | 2 | $330.23 | Add to Cart | |
| 86 | MX16120 | Brake Shoe And Lining Assembly | 2 | axles with R403 lining | Call for availability | |
| 86 | SR3014715QP | Brake Shoe And Lining Assembly | 2 | $165.41 | Add to Cart | |
| 87 | A3211M5733 | Brake Spider Assembly | 1 | $652.46 | Add to Cart | |
| 88 | 2258Y1273 | Brake Shoe Return Spring | 1 | $31.38 | Add to Cart | |
| 89 | 2297T7222 | Brake Shoe Roller | 2 | $58.30 | Add to Cart | |
| 90 | 3105B210 | Brake Shoe Roller Retainer | 2 | $35.20 | Add to Cart | |
| 91 | S264B | Dust Shield Capscrew | 5 | $511.00 | Add to Cart | |
| 92 | 3264P1290 | Dust Shield | 1 | Call for availability | ||
| 92 | 3264Q1291 | Dust Shield | 1 | Call for availability | ||
| 93 | 3264T1450 | Dust Shield | 1 | Call for availability | ||
| 93 | 3264S1449 | Dust Shield Figure MX -120 And MX | 1 | FIGURE; MX -120 and MX; -120HR | Call for availability | |
| 27 | A23275A1249S | Slack Adjuster Assembly | 2 * | Contains Items 94 95 97 98; *; , , , ,; 99 100; , | Call for availability | |
| 94 | A13275A1249 | Slack Adjuster | 1 | Call for availability | ||
| 95 | 1245Z1066 | Clevis | 1 | Standard clevis For use on ALL; LH and on RH in combination with; 3299-Y-7149 | $16.88 | Add to Cart |
| 96 | 1245H1074 | Clevis Offset | 1 | Offset Clevis For use on RH in; combination with 3299-Q-7349; ONLY. | $36.28 | Add to Cart |
| 97 | 19X1116 | Clevis Pin Large | 1 | $45.60 | Add to Cart | |
| 98 | 19X127 | Clevis Pin Small | 1 | $109.00 | Add to Cart | |
| 99 | 2257D1174 | Clip Large | 1 | $146.00 | Add to Cart | |
| 100 | 2257C1173 | Clip Small | 1 | $179.00 | Add to Cart | |
| 100 | A23275A1249S | All LH Slack Adjusters Can Be Ordered Be Ordered As Assembly A2-3275-A-1249S Clevises Must Be Ordered As Separate | as assembly | The RH slack adjusters; as assembly; clevises RH slack adjusters with; if they; 97 98 99 100).; components; , , , ,; 7 | Call for availability |
This is the complete factory parts breakdown for the Meritor MX-120/MX-120HR Front Drive Steer Axle, with every part in the manual matched to our live inventory. We stock 102 of the 158 parts above; click any part number to view it, or add it straight to your cart. Click a number on any diagram to jump to that part.
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