Matching the right part number to a McCormick MTX series tractor is what 683 pages of OEM catalog 7 4103 buy you, across four variants from the MTX120 to the MTX150 B Power. This McCormick MTX150 parts catalog PDF sorts the tractor by system: chassis with the automatic hitch and cab suspension, brakes with and without booster, electrical, engine, fuel, hydraulics, power train with Autospeed and creep speed, and steering down to the front axle and differential. Exploded views tie each component to its part number. Confirm the hydraulic pump is the 41cc displacement unit, and size seals and shims from the listings, such as the 11 x 2 mm O-ring or 0.30 mm shim. If your job is matching fuel injection parts to an MTX120 rather than an MTX135 or MTX150, each has its own listing. Bought once, the bookmarked, text-searchable PDF stays yours for this tractor, ready whenever the Autospeed valve mechanism needs a part.
What's Inside This McCormick MTX120, MTX135, MTX150, MTX150 B Power Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Chassis and Attachments | 1-171 | Automatic Hitch, Automatic Hitch Cylinder, Automatic Temperature Control, Cab, Cab Headliner Trim, Cab Mountings, Cab Suspension, Control Console |
| Brakes | 172-221 | Brake Discs, Brake Pedals and Master Cylinders, Brake System, Parking Brake, Pneumatic Trailer Brake, Hydraulic Trailer Brake Circuit, Valve Assembly Trailer Brake |
| Electrical System | 222-311 | Alternator, Battery and Cables, Electrical Junction Blocks, Front Worklights, Ground Speed Sensor, Harness Control Console, Harness Engine, Harness Instrument Panel |
| Engine | 312-357 | Air Cleaner, Air Conditioning Pipes, Air Conditioner Compressor and Condenser, Charge Cooler, Coolant Recovery System, Crankshaft, Cylinder Block, Cylinder Block Cover Camshaft |
| Fuel System | 358-372 | Electrical Control, Fuel Filter, Fuel Lines, Fuel Tank Mountings, Fuel Injection Nozzle, Fuel Injection System - MTX120, Fuel Injection System - MTX135, MTX150 |
| Hydraulic System | 373-461 | Cylinder Assembly Auto Hitch, Automatic Hitch Cylinder, Cab Suspension, Cylinder Assembly Cab Suspension, External Lubrication Circuit and Dipstick, Front Axle Adjustable |
| Power Train | 462-613 | Autospeed, Autospeed Valve Mechanism, Breather Assy, Clutch Shaft 4WD, Creep Speed Shifter Lever, Creep Speed Control Internal, Transmission Differential, Drive and Idler Gears 4WD |
| Steering System | 614-683 | Adjustable Front Axle 2WD, Drive Bevel Gear Axle, Differential, Drive Shaft, Front Axle, Front Axle Housing Axle, Front Axle Suspension, Front Axle Housing Suspension |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| O-Ring ID | 26,64 mm | p. 341 |
| Fuel filter hose length | 1350 mm | p. 361 |
| Hydraulic pump displacement | 41cc | p. 415 |
| O-ring size | 11 x 2 mm | p. 451 |
| Shim thickness | 0.30 mm | p. 453 |
| PTO Clutch O-Ring | 5 mm | p. 523 |
| Front Weight | 45kg (100lb) | p. 164 |
| Rear Wheel Weight | 50kg (110lb) | p. 582 |
| Alternator Output | 120 amp | p. 223 |
| Battery Capacity | 950 CCA | p. 228 |
| Heater Power | 120V/750W or 220V/750W | p. 326 |
| Front Hitch Capacity | 3500kg | p. 65 |
McCormick MTX120, MTX135, MTX150, MTX150 B Power Common Problems This Manual Covers
McCormick MTX series brake disc friction plate, piston and O-ring part numbers unclear for my transmission number
Check the Brake Discs exploded view on page 172 and confirm your transmission number first, because the listing splits at 304270 and 304271. From there, order the kevlar friction plate 351175A2, plate 220112A2, pistons 123938A1 and 711876A1, and O-rings 238-5277 and 238-5273. Order the full set so the pack goes back together matched.
Manual Section: Brakes p. 172Brake master cylinder or valve assembly ordered wrong because booster and non-booster pedal groups differ
Verify whether your tractor has the brake booster before you order anything. The with-booster pedal group on page 173 lists valve assembly 357760A2 and switch 177499A2. The without-booster group on page 175 lists cylinder 226301A1, reservoir 184627A2 and screen assembly 537518R1. Pedal assembly 282779A1 shows up in both groups.
Manual Section: Brakes p. 173Brake booster accumulator and check valve part numbers hard to pin down in the parts listing
Check the Brake System with Booster listing on page 179. Check valve 701997A1 sits in the same group as hose assembly 433578A2 and tee 700-455. The accumulator appears as 237995A1 with 372074A1 printed alongside it, plus a second entry, 368341A1. Compare against the tag on your existing unit before ordering.
Manual Section: Brakes p. 179Front brake system hydraulic pump and brake valve part numbers needed for earlier serial number tractors
Verify your serial number first. The Brake System Front listing on page 184 covers tractors up to JJE3337409. In that range, order pump 394268A2, brake valve 426541A1, check valve 713966A1 and manual valve 450539A2. Cross-check the hose assemblies on page 185 by position so each line goes back where it came from.
Manual Section: Brakes p. 184Alternator regulator, rectifier and belt part numbers hard to find for the 120 amp unit
Check the Alternator and Mounting view on page 222 for alternator 710627A1, belt 705140A1 and tensioner 707437A1. Page 223 confirms the 120 amp rating. For internal parts, use the breakdown on page 224, which lists regulator 712344A1, rectifier 712342A1, stator 712341A1, rotor 711340A1 and pulley 712350A1.
Manual Section: Electrical System p. 224Replacement battery, cables and master disconnect switch part numbers unclear for single or dual battery setups
Check the Battery and Cables listing on page 225 for battery entries including 713343A1, master disconnect switch 1983240C1 and key 1539005C1. Page 228 marks the heavy duty battery at 950 CCA and splits single and dual battery layouts. Count the batteries on your tractor before pulling cable numbers from page 226.
Manual Section: Electrical System p. 228Frequently Asked Questions
What is the part number for the Hitch Assy in this manual?
Page 1 lists part number 436470A1 for the Hitch Assy. p. 1
What is the part number for the Cylinder Assy in this manual?
Page 2 lists part number 252332A1 for the Cylinder Assy. p. 2
What is the part number for the Spring, To in this manual?
Page 9 lists part number 282244A1 for the Spring, To. p. 9
What is the part number for the Arm, Rocker in this manual?
Page 22 lists part number 249834A4 for the Arm, Rocker. p. 22
What is the part number for the Grille in this manual?
Page 25 lists part number 704045A1 for the Grille. p. 25
What do I get after purchasing this McCormick MTX120 manual?
A single searchable PDF file of 683 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Am I free to print this McCormick MTX120 Parts Catalog?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
