From tractor prep to the final snowblower attachment, this Kubota B2550 operator manual and parts catalog (OEM #70060-03613) runs 38 pages of procedures and service specs. Ten of those pages cover assembly of the pushframe, chute, and snowblower mount, backed by two pages of wiring diagrams for the electric chute rotation and optional deflector kits. The parts section splits into seven illustrated assemblies: push frame and lift mechanism, subframe, mid and front drivelines, snowblower head, worm gear box, and chute rotation. Fill the auger gearbox with AGMA 5EP or SAE 90 extreme pressure oil, then torque the 3/8-inch drive coupler set screws to 20-23 lb-ft (27.1-31.2 N-m). Section bookmarks drop you straight onto the page you need, whether you open it on a laptop or a phone in the cab.
What's Inside This Kubota B2550 Operator Manual
| System | Pages |
|---|---|
| Safety Decals | 6-6 |
| Assembly | 7-16 |
| Operation | 17-20 |
| Maintenance | 21-21 |
| Dismounting | 22-22 |
| Torque Specification Table | 38-38 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Set screw (3/8"NC x 3/8", allen) replacement part | O/L (Obtain Locally) | p. 32 |
| Set screw (5/16"NC x 1/2", allen) replacement part | O/L (Obtain Locally) | p. 32 |
| Oil seal replacement part | 70060-01290 | p. 31 |
| Auger gearbox oil type | AGMA 5EP or SAE 90 extreme pressure oil | p. 19 |
| Worm gear replacement part | 70060-01329 | p. 31 |
| Rotation worm (ccw) replacement part | 70060-01493 | p. 33 |
| Shear bolt (1/4"NC x 1", grade 5, with nylon lock nut) replacement part | 70060-01075 | p. 30 |
| Shear bolt (5/16" NC x 2 1/4", with lockwasher & nut) replacement part | 70060-01338 | p. 30 |
| Bearing with locking collar (1" bore) replacement part | 70060-01425 | p. 32 |
| Front Wheel Tire Pressure | 26-27 psi | p. 7 |
| Rear Wheel Tire Pressure | 7-8 psi | p. 7 |
| Skid Shoe Clearance (Asphalt) | 1/16" to 1/8" | p. 10 |
Kubota B2550 Common Problems This Manual Covers
Kubota B 2550 snowblower chute stops or binds when turning left or right with grinding at rotation drive p. 33
Inspect the worm gear assembly for peened or chipped teeth. Replace a damaged rotation worm with part 70060-01493, shown on page 33. Confirm the electric chute rotation kit bolts sit at 9-11 lbs.ft. so the chute does not bind.
Manual Section: AssemblyFront mount attachment separates or shifts unexpectedly during heavy snow clearing operations p. 38
Check the set screws in the drive couplers and subframe couplings first. Tighten any loose 3/8-inch Grade 2 set screws to 20-23 Pounds Feet per the torque table on page 38. Replace missing screws with locally sourced hardware to lock the linkage down.
Manual Section: Torque Specification TableAuger gearbox makes loud whining noise and produces poor snow throw distance p. 19
Drain the front reduction gearbox and look for metal shavings or milky, contaminated fluid. Refill with fresh AGMA 5EP or SAE 90 extreme pressure oil, detailed on page 19. Verify the level reaches the side plug threads before running it again.
Manual Section: Worm Gear Box Oil Level CheckFront snowblower vibrates aggressively, chatters heavily, or is extremely hard to start under load p. 21
Clear packed ice from the housing, then inspect the driveline. Grease the PTO driveline every 8 hours and the auger section every 24 hours per the maintenance schedule on page 21. Set the reduction chain to 1/4-inch deflection.
Manual Section: MaintenanceFrequently Asked Questions
What are the replacement specifications for set screws in drive couplers?
A 3/8" x 3/8" allen set screw secures the yoke to the reduction shaft. It appears as item 22 in the Reduction Box Assembly parts list on page 32, marked "Obtain Locally" (O/L) for replacement.
What are the replacement specifications for gearbox oil seals?
The worm gear box oil seal carries part number 70060-01290. Three seals are required for a complete worm gear box assembly.
What do I get after purchasing this Kubota B2550 manual?
Instant PDF download. The full 38-page searchable Operator Manual, Parts Catalog lands in your hands right after payment. Open it on a laptop, tablet, or phone out on the shop floor.
Are there any print restrictions on this Kubota B2550 manual?
Yes. Print as many copies as you want, with no restrictions. Plenty of mechanics print only the section they need and carry it to the shop floor.
Does this Kubota B2550 Operator Manual, Parts Catalog have electrical diagrams?
Included. The manual covers wiring schematics for the optional electric chute rotation and deflector kits.
Document Quality
This document is a scanned copy of the original manual, featuring an OCR layer that allows you to search and copy the full text. The text throughout is crisp and easy to read, with no noticeable fading or blur. All diagrams and illustrations are raster images, but they are clear with readable labels and part numbers. Pages are clean with typical minor scan artifacts and slight skewing, but no significant stains or marks. There are no notable blank or filler pages present in this document.
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