Meritor MX-120/MX-120HR Front Drive Steer Axle Parts Manual
MX-120 and MX-120HR
Click 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 | $130.00 | 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 | MX-10/12-120 axles with MA212; (LH) | — | Call for availability |
| 23 | QP61655452 | Brake Assembly | 1 | lining material See Figure 2 for; (RH); individual components | — | Call for availability |
| 23 | QP61655449 | Brake Assembly | 1 | MX-14-120 axles with R301; (LH) | $1,226.96 | Add to Cart |
| 23 | QP61655450 | Brake Assembly | 1 | lining material See Figure 2 for; (RH); individual components | $1,226.96 | Add to Cart |
| 23 | QP61655729 | Brake Assembly | 1 | MX-10/12/14-120 axles with; (LH) | — | Call for availability |
| 23 | QP61655730 | Brake Assembly | 1 | SOR610 lining material See; (RH); Figure 2 for individual components | — | Call for availability |
| 23 | QP61656781 | Brake Assembly | 1 | MX-16-120 axles with R403; (LH) | — | Call for availability |
| 23 | QP61656782 | Brake Assembly | 1 | lining material See Figure 2 for; (RH); individual components | — | Call for availability |
| 23 | QP616561113 | Brake Assembly | 1 | MX-16-120 axles with R301; (LH) | $1,190.01 | Add to Cart |
| 23 | QP616561114 | Brake Assembly | 1 | 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 | For use with Bendix WS-24 style; ABS equipped axles only. | $10.55 | Add to Cart |
| 33 | 2237Q1005 | Abs Clip | 2 | For use with WABCO ABS; equipped axles or Bendix WS-20; style ABS equipped axles | — | Call for availability |
| 34 | A3237Z1248 | Abs Sensor Assembly | 2 | Bendix WS-24 style ABS euipped; axles only. Replaces Bendix; WS-20 style ABS sensor; A-3237-Z-1 196 | $467.09 | Add to Cart |
| 34 | A2237B1328 | Abs Sensor Assembly | 2 | WABCO ABS equipped axles only | $76.54 | Add to Cart |
| 35 | A3111Z3874 | Steering Knuckle Assembly | 1 | Wheelbase < 190 in Contains; (LH); Items 24 25 A-31 1 1 -Z-3874; ,; replaces A-31 1 1 -R-3684; A-31 1 1 -A-3875 replaces | $1,363.28 | Add to Cart |
| 35 | A3111A3875 | Steering Knuckle Assembly | 1 | A-31 1 1 -T-3686 If replacing the; (RH); "old style" knuckle both the LH; ,; and RH sides m ust be replaced | $1,938.13 | Add to Cart |
| 35 | A3111B3876 | Steering Knuckle Assembly | 1 | Wheelbase >= 190 in Contains; (LH); Items 24 25 A-31 1 1 -B-3876; ,; replaces A-31 1 1 -V-3688; A-31 1 1 -C-3877 replaces | — | No longer available — call for replacement |
| 35 | A3111C3877 | Steering Knuckle Assembly | 1 | A-31 1 1 -W-3689 If replacing the; (RH); "old style" knuckle both the LH; ,; and RH sides m ust be replaced | $1,148.18 | Add to Cart |
| 35 | 2803L3444 | Shim .005" | 1 | Knuckle end -play. Available; As | $11.84 | Add to Cart |
| 35 | 2803M3445 | Shim .015" | As req. | in KIT 4760 | $12.88 | Add to Cart |
| 35 | 2803N3446 | Shim .025" | 1 | $12.80 | Add to Cart | |
| 35 | 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 | $33.68 | Add to Cart | |
| 42 | 1229M1625 | Washers Upper Knuckle Cap/ Steering Arm | 10 | $41.80 | Add to Cart | |
| 43 | 3299X7148 | Chamber Bracket | 1 | LH | $251.03 | Add to Cart |
| 43 | 3299Y7149 | Chamber Bracket | 1 | RH | $251.06 | Add to Cart |
| 43 | 3299Q7349 | Chamber Bracket | 1 | RH For use with 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 | $130.00 | Add to Cart | |
| 48 | A673276T20 | Air Brake Chamber | 2 | MX-10/12/14-120 axles | $229.94 | Add to Cart |
| 48 | A883276X24 | Air Brake Chamber | 2 | MX-16-120 axles | $214.95 | Add to Cart |
| 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) | $60.94 | Add to Cart |
| 51 | R230069 | Tie Rod End | 1 | (RH); 5 | $60.94 | Add to Cart |
| A3102Y3457 | Tube W/ Clamps | 1 | For Std Track (1752m m KPI); Standard Duty (38 .1 m m OD) | — | No longer available — call for replacement | |
| A3102Z3458 | 1 | For Wide Track (1790m m KPI); Standard Duty (38 .1 m m OD) | $244.63 | Add to Cart | ||
| A3102N3472 | 1 | For Std Track (1752m m KPI); Heavy Duty (44 .5m m OD) | $233.29 | Add to Cart | ||
| A3102G3465 | 1 | For Wide Track (1790m m KPI); Heavy Duty (44 .5m m OD) | — | No longer available — call for replacement | ||
| A23102Y3457 | Assembly | 1 | For Std Track (1752m m KPI); Standard Duty (38 .1 m m OD) | $372.26 | Superseded by A23102K4379Add to Cart | |
| A23102Z3458 | 1 | For Wide Track (1790m m KPI); Standard Duty (38 .1 m m OD) | $841.77 | Add to Cart | ||
| A23102N3472 | 1 | For Std Track (1752m m KPI); Heavy Duty (44 .5m m OD) | $333.28 | Add to Cart | ||
| A23102G3465 | 1 | For Wide Track (1790m m KPI); Heavy Duty (44 .5m m OD) | — | No longer available — call for replacement | ||
| 1225L1442 | Axle Shaft Bushing | 1 | Replaces 1225-G-1333 | $63.51 | Add to Cart | |
| A1205V2648 | Seal Axle Shaft | 2 | $60.42 | Add to Cart | ||
| A3205W1115 | Shaft Assembly LH | 1 | For KPI 69 " (1752m m) | $2,214.23 | Add to Cart | |
| A3205J1128 | For KPI 70 .5" (1790m m) | $6,862.61 | Add to Cart | |||
| A1205U2647 | Axle Shaft | 2 | SEAL MUST BE INSTALLED; WITH NOTCH ON TOP | $85.27 | Add to Cart | |
| Housing Assembly | 1 | See Bill of Materials; Contains Items 58 60 61; , ,; Three piece housing (before 1 1/03); also contains items 65 66 67 68; , , , | — | Call for availability | ||
| 1225U1191 | Pin Bushing | 4 | $71.24 | Add to Cart | ||
| 1250V1218 | Plug | 4 | $8.12 | Add to Cart | ||
| 1250E473 | Fill Plug | 1 | $16.72 | Add to Cart | ||
| A1199W4053 | Assembly | 1 | $175.80 | Add to Cart | ||
| 1250E473 | Drain Plug | 1 | $16.72 | Add to Cart | ||
| 1246Z390 | Spring Plate | 1 | — | Call for availability | ||
| 3305S1449 | Plate | 1 | Not required with one-piece | — | Call for availability | |
| 1229C1511 | Spring Plate | 1 | housing (after 1 1/03) | — | Call for availability | |
| S2812A2 | Spring Plate | 1 | $2.74 | Superseded by S2812A1Add to Cart | ||
| Assembly | 1 | See Bill of Materials | — | Call for availability | ||
| 1229C1511 | Carrier Housing | 12 | — | Call for availability | ||
| 10X1602 | (short) Carrier Housing | 8 | — | Call for availability | ||
| 10X1603 | (long) Carrier Housing | 4 | — | Call for availability | ||
| 1 | See Bill of Materials | — | Call for availability | |||
| 1229A2653 | Yoke | 1 | — | Call for availability | ||
| 40X1236 | Yoke | 1 | — | Call for availability | ||
| A3205X1116 | Shaft Assembly RH | 1 | $2,055.28 | Add to Cart | ||
| 3266A1457 | 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 | Part No. | Description | Qty | Notes | Price | |
|---|---|---|---|---|---|---|
| 78 | 2210E8585 | Camshaft | 1 | LH | $77.02 | Add to Cart |
| 78 | 2210D8584 | Camshaft | 1 | RH | $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 | MX-10/12-120 axles with MA212; lining material Contains Items; 89 90; , | $174.16 | Add to Cart |
| 86 | A43222Z2288 | Brake Shoe And Lining Assembly | 2 | MX-14-120 axles with R301 lining; material Contains Items 89 90; , | $220.06 | Add to Cart |
| 86 | A293222Z2288 | Brake Shoe And Lining Assembly | 2 | MX-10/12/14-120 axles with; SOR610 lining material Contains; Items 89 90; , | — | Call for availability |
| 86 | A83222P2200 | Brake Shoe And Lining Assembly | 2 | MX-16-120 axles with R403 lining; material Contains Items 89 90; , | $330.23 | Add to Cart |
| 86 | SR3014715QP | Brake Shoe And Lining Assembly | 2 | MX-16-120 axles with R301 lining; material Contains Items 89 90; , | $165.41 | Add to Cart |
| 87 | A3211M5733 | Brake Spider Assembly | 1 | Contains Items 80 81 84; , , | $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 | LH | — | Call for availability |
| 92 | 3264Q1291 | Dust Shield | 1 | RH | — | Call for availability |
| 93 | 3264T1450 | Dust Shield | 1 | LH | — | Call for availability |
| 93 | 3264S1449 | Dust Shield Figure Mx -120 And Mx | 1 | RH; -120HR | — | Call for availability |
| A23275A1249S | Adjuster Assembly | 2 | Contains Items 94 95 97 98; *; , , , ,; 99 100; , | — | Call for availability | |
| A13275A1249 | Adjuster | 1 | — | Call for availability | ||
| 1245Z1066 | 1 | Standard clevis For use on ALL; LH and on RH in combination with; 3299-Y-7149 | $16.88 | Add to Cart | ||
| 1245H1074 | Offset | 1 | Offset Clevis For use on RH in; combination with 3299-Q-7349; ONLY. | — | Call for availability | |
| 19X1116 | Pin Large | 1 | $45.60 | Add to Cart | ||
| 19X127 | Pin Small | 1 | $109.00 | Add to Cart | ||
| 2257D1174 | Large | 1 | $146.00 | Add to Cart | ||
| 2257C1173 | Small | 1 | $179.00 | Add to Cart | ||
| A23275A1249S | LH Slack Adjusters Can Be Ordered Ordered As Assembly A2-3275-A-1249S | The RH slack adjusters; as assembly; clevises RH slack adjusters with; if they | — | Call for availability | ||
| ITEMS9496 | Must Be Ordered As Separate | 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 — 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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