Case 621G Wheel Loader Service Parts Catalogue (531613621PC) (December 2025)

A 621G wheel loader usually lives a hard life—quarries, feed yards, snow work, construction sites—dust, vibration, and operators who just need it to run. This service parts catalogue helps you plan a job before you crack a single fitting: trace assemblies, match part numbers, and stage everything so you’re not stuck waiting on a $5 seal. Picture this: you’re planning a center-pin rebuild next Friday; with this book, you can walk the machine, inspect what’s worn, then sit down, trace the exploded view, and have every pin, shim, and bushing on the bench ahead of time.

Applications & Use Cases

• Plan a full axle reseal by tracing each exploded view, so you order every O‑ring and gasket instead of finding the one you missed mid-bleed.
• During teardown, verify each bearing and bushing by matching the catalogue callout to what’s in your hand, so look‑alike parts don’t get mixed.
• Isolate which hoses, clamps, and brackets you’ll need when you route new lines through the loader frame.
• Check superseded numbers before you order, so the dealer pulls the right updated part the first time.
• Inspect wear items on a walk‑around, then flag them in the book to build a parts list for the next service window.

FAQ

Q: Is this something I can download and search, or just a paper book?

A: It’s typically offered as a digital file you can search by part number or description, and many folks still print key sections for the shop.

Q: Will the diagrams be readable on a phone or do I need a laptop in the shop?

A: You can zoom on a phone or tablet, but for tracing small clips and shims, a laptop or printed pages on the bench usually works better.

Safety Note

Always lock out the machine, block raised components, and bleed off any stored pressure before you start pulling parts you’ve just identified in the catalogue.

Case 621G Wheel Loader Index:

00.000.00 PICTORIAL INDEX – MAIN SECTIONS
00.000.10 [01] PICTORIAL INDEX – ENGINE
00.000.21 [01] PICTORIAL INDEX – TRANSMISSION
00.000.25 [01] PICTORIAL INDEX – FRONT AXLE
00.000.27 [01] PICTORIAL INDEX – REAR AXLE SYSTEM
00.000.33 [01] PICTORIAL INDEX – BRAKES & CONTROLS
00.000.35 [01] PICTORIAL INDEX – HYDRAULIC SYSTEM
00.000.39 [01] PICTORIAL INDEX – FRAMES AND BALLASTING
00.000.41 [01] PICTORIAL INDEX – STEERING
00.000.44 [01] PICTORIAL INDEX – WHEELS
00.000.50 [01] PICTORIAL INDEX – CAB CLIMATE CONTROL
00.000.55 [01] PICTORIAL INDEX – ELECTRICAL SYSTEMS
00.000.55 [04] PICTORIAL INDEX – ELECTRICAL SYSTEMS
00.000.82 [01] PICTORIAL INDEX – FRONT LOADER AND BUCKET
00.000.90 [02] PICTORIAL INDEX – PLATFORM, CAB, BODYWORK AND DECALS
00.100.03 [01] SERIAL NUMBER PLATE LOCATION
00.100.03 [02] SERIAL NUMBER PLATE LOCATION
00.100.03 [03] LOCATION OF SERIAL AND PRODUCT IDENTIFICATION NUMBERS
00.100.03 [04] LOCATION OF SERIAL AND PRODUCT IDENTIFICATION NUMBERS
50.000.00 PICTORIAL INDEX – CAB CLIMATE CONTROL
05.100.01 [01] INITIAL STOCKING LIST (LIST A)
05.100.02 [01] INITIAL STOCKING LIST (LIST B)
05.100.03 CAPACITIES
05.100.03 [01] FILTERS
05.100.99 INITIAL STOCKING LIST (LIST C)
10.000.00 [01] SECTION INDEX – ENGINE
10.001.010 [01] ENGINE; (Var) 04C02BA
10.001.020 VAR – 734812, 734801 – ENGINE INSTALLATION; (Var) 04C02BA
10.102.030 [01] VAR – 782440 – DRIVE BELT COVER, W/ AIR CONDITIONING; (Var) 04C07DA
10.202.010 VAR – 734819, 734801 – AIR CLEANER INSTALLATION; (Var) 04C02BA
10.202.010 [01] AIR CLEANER ASSY; (Var) 04C02BA
10.202.010 [04] AIR CLEANER ASSEMBLY; (Var) 04C02BA
10.206.020 FUEL FILTER WATER SEPARATOR W/ HEATER; (Var) 04C16CW
10.216.010 FUEL LINE INSTALLATION; (Var) 04C02BA
10.216.010 [01] FUEL TANK INSTALLATION; (Var) 04C02BA; (Prod Date) After 23 Jul 2015
10.254.010 MUFFLER AND EXHAUST SYSTEM; (Var) 04C02BA
10.400.010 VAR – 482585, 782454 – COOLER INSTALLATION, STANDARD; (Var) 04C05CA
10.400.040 [01] COOLING SYSTEM LINE INSTALLATION; (Var) 04C05CA
10.400.040 [02] COOLING SYSTEM LINE INSTALLATION; (Var) 04C05CA
10.400.060 COOLER TOP SCREEN INSTALLATION, STANDARD; (Var) 04C05CA
10.500.010 [01] DEF/ADBLUE LINES; (Var) 04C02BA
10.500.020 [01] DEF TANK INSTALLATION; (Var) 04C02BA
10.500.020 [02] DEF TANK ASSEMBLY; (Var) 04C02BA
10.500.040 [01] DEF LINES ELECTRONIC CONTROL UNIT; (Var) 04C02BA
21.000.00 SECTION INDEX – TRANSMISSION
21.100.010 OIL PUMP AND REGULATOR VALVE; (Var) 04C03AA
21.105.010 VAR – 424224, 424225 – TRANSMISSION HYDRAULIC LINES; (Var) 04C03AA
21.105.010 [02] VAR – 424224, 424225 – TRANSMISSION MOUNTING & FILL TUBE; (Var) 04C03AA
21.105.020 TRANSMISSION, FILTER AND FILL COVERS; (Var) 04C03AA

41.101.020 STEERING COLUMN ELECTRICAL PEDESTAL; (Var) 04C07CT01
41.200.010 [01] VAR – 482930, 782441 – STANDARD STEERING CONTROL LINE; (Var) 04C08AA
41.200.020 [01] VAR – 782441 – STANDARD STEERING – W/O JOYSTICK; (Var) 04C08AA
41.200.080 [01] STEERING CONTROL VALVE, ORBITROL; (Var) 04C02BA,04C08AA
41.216.010 STEERING CYLINDER, MOUNTING; (Var) 04C02BA
41.216.020 [01] STEERING CYLINDER ASSEMBLY; (Var) 04C02BA
44.000.00 [01] SECTION INDEX – WHEELS
44.000.010 VAR – 9420437, 9420466, 9420474, 782585, 424784,424785,424786,424787,424919,424998 –
WHEEL ASSEMBLY THREE PIECE; (Var) 04C13AA
44.000.020 WHEELS
50.100.020 HEATER ASSEMBLY; (Var) 04C07DA
50.100.040 HEATER INSTALLATION W/ A/C; (Var) 04C07DA
50.100.050 VAR – 782440 – HEATER W/ A/C ASSEMBLY; (Var) 04C07DA
50.100.060 AIR CONDITIONING CONDENSER; (Var) 04C07DA
50.100.070 VAR – 782440 – CAB HEATER HOSE; (Var) 04C07DA
50.200.010 VAR – 734065 – AIR CONDITIONING, HEATER COVER ASSEMBLY; (Var) 04C07CT01
50.300.010 VAR – 734064, 734065 – AIR DUCT ASSEMBLY; (Var) 04C07CT01
55.000.00 [01] PICTORIAL INDEX – ELECTRICAL SYSTEMS
55.000.00 [02] PICTORIAL INDEX – ELECTRICAL SYSTEMS
55.024.010 [01] TRANSMISSION HARNESS INSTALLATION; (Var) 04C02BA
55.024.010 [02] TRANSMISSION HARNESS ASSEMBLY; (Var) 04C02BA
55.101.010 [01] VAR- 734114, 734115 – FRONT CHASSIS HARNESS INSTALLATION, Z-BAR / XR; (Var)
04C02BA
55.101.010 [02] FRONT CHASSIS HARNESS ASSEMBLY, Z-BAR / XR; (Var) 04C02BA
55.101.020 [01] ENGINE AND REAR CHASSIS HARNESS INSTALLATION; (Var) 04C02BA
55.101.020 [02] ENGINE AND REAR CHASSIS HARNESS INSTALLATION; (Var) 04C02BA
55.101.020 [03] FUSE BOX RELAY HOLDER INSTALLATION; (Var) 04C02BA
55.101.020 [04] FUSE HOLDER RELAY ASSEMBLY; (Var) 04C02BA
55.101.040 [01] FAN WIRE HARNESS ASSEMBLY; (Var) 04C02BA
55.101.050 [01] ENGINE AND REAR CHASSIS HARNESS ASSEMBLY; (Var) 04C02BA
55.101.050 [02] ENGINE AND REAR CHASSIS HARNESS ASSEMBLY; (Var) 04C02BA
55.201.010 [01] ENGINE STARTER INSTALLATION; (Var) 04C02BA
55.201.020 VAR – 482322, 734111 – HEAVY DUTY BATTERY INSTALLATION; (Var) 04C16CW
55.201.030 VAR – 726013 – BATTERY CABLES AND JUMP POSTS; (Var) 04C02BA
55.202.010 VAR – 482322 – GRID HEATER INSTALL; (Var) 04C16CW
55.202.020 VAR – 482322 – CYLINDER BLOCK HEATER, 750W; (Var) 04C16CW
55.301.020 [01] VAR – 782440 – ALTERNATOR PULLEY, BELT AND BRACKET INSTALLATION, W/ A/C;
(Var) 04C07DA
55.404.010 VAR – 734087 – FRONT LIGHT INSTALLATION; (Var) 04C16LW01,04C16SL
55.404.010 [01] FRONT LIGHT ASSEMBLY; (Var) 04C16LW01,04C16SL
55.404.040 REAR LIGHT INSTALLATION; (Var) 04C02BA
55.404.070 VAR – 734140 – 4 CORNER STROBE LIGHT; (Var) 24U16FC
55.404.090 [01] VAR – 482140 – LICENSE PLATE HOLDER, LIGHT; (Var) 04C16LP
55.404.110 [01] VAR – 734067, 734068, 734131, 734132 – WORK LIGHT, CAB, 2 FRONT, 2 REAR; (Var)
04C16LW01
55.425.010 ELECTROHYDRAULIC SENSOR, LIFT AND HOLD, Z-BAR; (Var) 04C02BA
55.425.010 [01] ELECTROHYDRAULIC SENSOR ASSEMBLY, LIFT AND TILT, Z-BAR; (Var) 04C02BA
55.510.010 [01] VAR – 734064, 734065 – CAB ROOF HARNESS INSTALLATION; (Var) 04C07CT01
TABLE OF CONTENTS
55.510.010 [02] CAB ROOF HARNESS ASSEMBLY; (Var) 04C07CT01
55.510.020 [01] CAB BOTTOM HARNESS INSTALLATION; (Var) 04C07CT01
55.510.020 [02] CAB BOTTOM HARNESS ASSEMBLY; (Var) 04C07CT01
55.510.030 [01] VAR – 734064 734065, CAB MAIN WIRE HARNESS, INSTALLATION; (Var) 04C07CT01
55.510.030 [02] CAB MAIN WIRE HARNESS FUSE AND RELAYS; (Var) 04C07CT01
55.510.030 [03] CAB MAIN WIRE HARNESS ASSEMBLY; (Var) 04C07CT01
55.510.030 [04] CAB MAIN WIRE HARNESS ASSEMBLY; (Var) 04C07CT01
55.510.030 [05] CAB MAIN WIRE HARNESS ASSEMBLY; (Var) 04C07CT01
55.510.030 [06] CAB MAIN WIRE HARNESS ASSEMBLY; (Var) 04C07CT01
55.512.070 VAR – 734048, 734064 – EVOLUTION CONTROL MONITOR, DISPLAY; (Var) 04C07EV
55.518.010 VAR – 782897 – WASHER BOTTLE BOX COVER; (Var) 04C16SC
55.518.020 VAR – 734065 – WASHER BOTTLE INSTALLATION; (Var) 04C07CT01
55.518.020 [01] WASHER, TANK, ASSY, WASHER BOTTLE ASSEMBLY; (Var) 04C07CT01
55.518.030 VAR – 734064, 734065 – REAR WINDSHIELD WIPER INSTALLATION; (Var) 04C07CT01
55.518.040 VAR – 734064, 734065 – FRONT WINDSHIELD WIPER MOUNT; (Var) 04C07CT01
55.988.010 SCR HARNESS INSTALLATION; (Var) 04C02BA
55.990.010 [01] HOOD HARNESS INSTALLATION; (Var) 04C02BA
55.990.010 [02] HOOD HARNESS ASSEMBLY; (Var) 04C02BA
55.991.010 [01] VAR – 424233, 734017, 734031, 734032, 734033, 734034,734035,734036,734037,734038,
734040, 734135, 734136 – TELEMATIC SYSTEM; (Var) 04C16TM
82.000.00 [01] PICTORIAL INDEX – BUCKET
82.100.020 VAR – 782537, 782851 – LIFT ARM PIN, Z BAR LIFT ARM AND XR/LR; (Var) 04C14CC01
82.100.070 VAR – 482047, 424917, 424248 – CNH QUICK COUPLER, Z-BAR, XR; (Var) 04C14CC01
88.100.010 [01] VAR – 482140, 482949 – FRONT LICENSE PLATE SUPPORT; (Var) 04C16LP
88.100.035 DIA KIT, 621G XT, 4TH SPOOL CONVERSION KIT
88.100.060 [01] VAR – 482140 – LICENSE PLATE HOLDER; (Var) 04C16LP
88.100.10 [02] DIA KIT, DEF BLANKETS
88.100.33 DIA KIT, SECTION INDEX – BRAKES & CONTROLS
88.100.35 [02] FOURTH SPOOL CONVERSION KIT
88.100.35 [03] DIA KIT, ACCESSORY LINE, Z – BAR
88.100.35 [06] DIA KIT, VARIABLE SPEED REVERSIBLE FAN
88.100.35 [07] DIA KIT, FIELD RIDE CONTROL CONVERSION
88.100.35 [09] DIA KIT, 3 FN LEVER TO 3 FN JOYSTICK CONVERSION KIT
88.100.35 [10] DIA KIT, 2 FN LEVER TO 4 FN JOYSTICK CONVERSION KIT
88.100.35 [11] DIA KIT, 3 FN LEVER TO 4 FN JOYSTICK CONVERSION KIT
88.100.35 [12] DIA KIT, 2 FN JOYSTICK TO 3 FN JOYSTICK CONVERSION KIT
88.100.35 [13] DIA KIT, 2 FN JOYSTCIK TO 4 FN JOYSTICK CONVERSION KIT
88.100.35 [14] DIA KIT, 3 FN JOYSTICK TO 4 FN JOYSTICK CONVERSION KIT
88.100.35 [15] DIA KIT, 2 FN JOYSTICK TO 3 FN LEVER CONVERSION KIT
88.100.35 [16] DIA KIT, 2 FN LEVER TO 2 FN JOYSTICK CONVERSION KIT
88.100.35 [17] DIA KIT, 3 FN LEVER TO 3 FN JOYSTICK CONVERSION KIT
88.100.35 [18] DIA KIT, 2 FN JOYSTICK TO 2 FN LEVER CONVERSION KIT
88.100.35 [19] DIA KIT, 3 FN JOYSTICK TO 3 FN LEVER CONVERSION KIT
88.100.39 DIA KIT, SECTION INDEX – FRAMES AND BALLASTING
88.100.39 [01] DIA KIT, FRONT ARTICULATION GUARDS
88.100.39 [02] DIA KIT, SKID AND FUEL TANK GUARDS
88.100.39 [04] DIA KIT, FIELD SKID PLATE
88.100.39 [07] DIA KIT, WINDSHIELD GUARD, ZB/XR
88.100.39 [08] DIA KIT, WINDSHIELD GUARD ZB/XR

88.100.39 [085] DIA KIT, DRIVING LIGHT GUARDS
88.100.39 [09] DIA KIT, REAR FRAME SIDE COVER
88.100.55 DIA KIT, SECTION INDEX – ELECTRICAL SYSTEMS
88.100.55 [01] DIA KIT, REAR VIEW CAMERA
88.100.55 [05] DIA KIT, COLD WEATHER PACKAGE
88.100.55 [07] DIA KIT, RADIO
88.100.90 DIA KIT, SECTION INDEX – PLATFORM, CAB, BODYWORK & DECALS
88.100.90 [01] DIA KIT, SKID PLATE
88.130.20 [02] KIT, JOYSTICK 2 FN 4FN
88.130.20 [07] KIT, ACCESSORIES LINE Z-BAR
88.130.20 [09] DIA KIT, 3 FN LEVER TO 3 FN JOYSTICK CONVERSTION KIT
88.130.20 [17] DIA KIT, ACCESSORIES, LINE ZBAR
88.130.60 KIT, CAB, HINGE
00.000.90 [03] PICTORIAL INDEX – PLATFORM, CAB, BODYWORK AND DECALS
90.000.00 [01] SECTION INDEX – PLATFORM, CAB, BODYWORK & DECALS
90.000.00 [02] SECTION INDEX – PLATFORM, CAB, BODYWORK & DECALS
90.100.010 ENGINE HOOD; (Var) 04C02BA
90.100.020 ENGINE HOOD INSTALLATION; (Var) 04C02BA
90.100.030 VAR – 424223 – RAIN CAP; (Var) 04C02ZZ14
90.100.050 VAR – 402018, 402019 – 05C18SS – HOOD PANELS; (Var) 04C02BA,04C18SS
90.102.010 [01] VAR – 402049, 424234 – NO CAMERA COVER; (Var) 04C16CN
90.108.010 [01] DECALS COMMON TO MODEL
90.108.010 [02] DECALS COMMON TO MODEL
90.108.020 [01] VAR – 482105 – DECALS, ENGLISH; (Var) 04C12EN
90.108.020 [02] VAR – 482106 – DECALS, FRENCH CANADIAN
90.108.020 [03] VAR – 482190 – DECALS, SPANISH
90.116.010 [01] VAR – 734812, X50103X – SKIRT, CAB, POWER TAN; (Var) 04C18SS
90.116.040 VAR – 782509. 782510, 782511 – FRONT FENDER INSTALLATION, STANDARD; (Var)
04C11BA
90.116.050 FENDER SUPPORT BRACKET, RIGHT HAND; (Var) 04C11BA
90.116.060 REAR SKID PLATE; (Var) 04C16SP
90.116.090 VAR – 782509 – REAR FENDER STANDARD PLATFORM; (Var) 04C11BA
90.116.120 WHEEL WELL GUARD; (Var) 04C11BA
90.118.010 VAR – 782509, 782510, 782511 – STEP, LEFT SIDE; (Var) 04C11BA
90.118.030 VAR – 782203 – MIRROR; (Var) 04C16MR
90.120.010 VAR – 734062, 734072 – 734118 – SEAT, MECHANICAL SUSPENSION; (Var) 04C10CA
90.120.010 [01] VAR – 734062, 734072, 734118 – SEAT, MECHANICAL SUSPENSION SERVICE PARTS;
(Var) 04C10CA
90.120.010 [02] SEAT, MECHANICAL SUSPENSION SERVICE PARTS; (Var) 04C10CA
90.120.040 [01] VAR – 782774 – HEADREST CUSHION; (Var) 04C16SR
90.120.110 VAR – 734054 – JOYSTICK INSTALLATION, RIGHT SIDE, W/ 1 AUX CONTROL; (Var)
04C09FA01
90.120.120 VAR – 734054 – JOYSTICK ASSEMBLY, RIGHT SIDE W/ 1 AUX CONTROL; (Var) 04C09FA01
90.124.010 [01] VAR – 734063, 734073 – SEAT, AIR SUSPENSION SERVICE PARTS, HEATED
90.124.010 [02] VAR – 734063, 734073, 734119 – SEAT, AIR SUSPENSION, HEATED
90.150.010 VAR – 734064, 734065 – CAB MOUNTING PARTS; (Var) 04C07CT01
90.150.020 VAR – 734065 – CAB ROOF; (Var) 04C07CT01
90.150.030 VAR – 734065, 734064 – CAB GRAB RAIL; (Var) 04C07CT01
90.151.020 [01] VAR – 734059 – 3” SEAT BELT HARDWARE AND MOUNTING; (Var) 04C10SB02
TABLE OF CONTENTS
90.151.030 VAR – 734065, 734064 – REAR VIEW MIRROR, INTERNAL; (Var) 04C07CT01
90.151.040 VAR – 734065 – SUN CURTAIN INSTALLATION; (Var) 04C07CT01
90.151.050 VAR – 734065, 734064 – CAB COAT HOOK AND FLOOR MAT; (Var) 04C07CT01
90.154.010 LEFT DOOR INSTALLATION; (Var) 04C07CT01
90.154.010 [01] LEFT DOOR ASSEMBLY; (Var) 04C07CT01
90.156.020 VAR – 734064, 734065 – RIGHT SIDE WINDOW INSTALLATION; (Var) 04C07CT01
90.156.020 [01] VAR – 734065 – RIGHT SIDE WINDOW ASSEMBLY; (Var) 04C07CT01
90.156.030 VAR – 734064, 734065 – FRONT WINDSHIELD MOUNTING; (Var) 04C07CT01
90.156.040 VAR – 734065 – 734064 – REAR WINDSHIELD WITH HEATER; (Var) 04C07CT01
90.160.010 VAR – 734065, 734064 – CAB INTERIOR COVER; (Var) 04C07CT01
90.160.010 [01] VAR – 734065 – CAB INTERIOR COVER; (Var) 04C07CT01
90.160.020 VAR – 734065 – FRONT CONSOLE COVER; (Var) 04C07CT01
90.160.030 OVERHEAD CONSOLE; (Var) 04C07CT01
95.088.SPA [01] SNOW PUSHER ATTACHMENT,11.5 FT
95.088.SPA [02] SNOW PUSHER ATTACHMENT,14 FT
95.088.SPA [03] SNOW PUSHER ATTACHMENT,17 FT

CNH