John Deere 350B Crawler Loader: Specs, Parts & Common Issues
Produced 1971 – 1975, the John Deere 350B Crawler Loader is the compact tracked loader sibling to the 350B Dozer — same JD 3-cylinder diesel engine, same refined chassis, same mechanical drivetrain, with a front-mounted hydraulic loader bucket and arms in place of the dozer blade. The 350B Loader earned a reputation as a reliable, easy-to-service compact track loader for trenching, light loading, and material handling.
The John Deere 350B Crawler Loader is the compact tracked loader sibling to the 350B Dozer, produced from 1971 through 1975. The 350B Loader shares chassis, drivetrain, engine, and undercarriage with the 350B Dozer but mounts a hydraulic loader bucket on lifting arms instead of a dozer blade. The B-generation introduced refined hydraulics, improved operator controls, and stronger durability over the original 350 Loader.
For owners and operators today, the 350B Loader is a refined compact tracked loader for small-scale material handling — trenching, light loading, site clean-up, and material moving where wheel loaders can’t operate or aren’t practical.
At-a-glance specifications
John Deere 350B Crawler Loader — factory specifications
- Production years
- 1971 – 1975
- Sibling machine
- John Deere 350B Dozer (same chassis)
- Engine
- John Deere 3-cylinder diesel
- Power
- ~45 horsepower flywheel
- Transmission
- Mechanical (multi-speed forward and reverse)
- Hydraulics
- Refined loader hydraulics (boom lift, bucket curl/dump)
- Bucket capacity
- Approximately 0.75 – 1.0 cubic yards
- Operating weight
- ~10,500 – 12,000 lb depending on configuration
- Serial plate location
- Right side of chassis frame or near operator station
How the 350B Loader compares to the original 350 Loader
- Refined hydraulics — improved boom and bucket cylinder response over the original 350 Loader.
- Stronger durability — strengthened loader arms, bucket mount, and pivot pins.
- Updated operator controls — refined control layout for better operator ergonomics.
- Same engine architecture — JD 3-cylinder diesel continues with minor refinements.
John Deere 3-cylinder diesel engine
The 350B Loader uses the same John Deere 3-cylinder diesel engine as the 350B Dozer. The 3-cylinder Deere diesel ecosystem is broad — accessory parts (water pump, alternator, starter, oil pump, fuel injection pump, injectors) share with other Deere small tractor applications. Browse the John Deere Dozer Parts hub for current 350B Loader engine service kits.
Loader hydraulic system
The 350B Loader uses refined hydraulic cylinders for boom lift and bucket curl/dump. Standard service items at production-run age:
- Boom cylinder seal kits — routine seal-replacement candidate.
- Bucket cylinder seal kits — routine seal-replacement candidate.
- Cylinder rod chrome service — corrosion on rods causes premature seal wear.
- Loader valve seal kits — control valve seals can develop weep at production-run age.
- Bucket pivot pins and bushings — routine wear from operating cycles.
Undercarriage
The 350B Loader undercarriage is the same as the 350B Dozer undercarriage — compact-class components shared across the 350B family. Sprocket bolt patterns, idler geometries, master pin dimensions, roller designs all cross-fit with the 350B Dozer.
Browse the John Deere Dozer Parts hub for current 350B Loader undercarriage availability.
Common service items on the 350B Loader
Engine accessory aging
Water pump, alternator, starter, fuel injection pump, and injectors on the JD 3-cyl diesel are routine service items on 50-year-old engines.
Clutch and steering clutch service
Main engine clutch and steering clutches wear with use. Replacement clutch facings, springs, and pressure plate service are routine.
Loader hydraulic seal failure
Boom and bucket cylinder seals are routine seal-replacement candidates at production-run age. Cylinder rod chrome corrosion is also typical.
Bucket teeth and cutting edge wear
Bucket teeth and cutting edges are the most frequent service items on a working 350B Loader. Replacement teeth and edges are widely available aftermarket.
Undercarriage replacement cycles
Same undercarriage as the 350B Dozer. Track chains, rollers, idlers, and sprockets all have measurable wear lives.
Parts and cross-fit components for the John Deere 350B Crawler Loader
| Component area | What to look for | Notes |
|---|---|---|
| Sprockets & segments | Compact-class track sprocket assemblies, bolt-on segments | Cross-fits 350B Dozer family. |
| Idlers & rollers | Front idler assemblies, top and bottom roller sets | Cross-fits 350B Dozer undercarriage. |
| Track recoil & adjusters | Recoil spring, adjuster yoke, chrome rod | Confirm by serial. |
| Master pins | Track master pin and bushing | 350B-class specific. |
| Bucket teeth & cutting edges | Standard and severe-duty bucket teeth, edges | Loader-specific — different from 350B Dozer blade hardware. |
| Boom & bucket cylinder seal kits | Boom cylinder, bucket cylinder seal kits | Loader-specific cylinder dimensions. |
| Bucket pins & bushings | Pivot pins and bushings | Routine wear items on the bucket pivot. |
| Engine accessory parts (JD 3-cyl diesel) | Water pump, alternator, starter, fuel injection | John Deere 3-cyl diesel parts ecosystem. |
| Radiators & cooling | Radiator cores, fan belts, hose sets | Same cooling system as 350B Dozer. |
| Filter service kits | Engine oil, fuel, air filter sets | Vintage JD filter kits. |
| Engine clutch & steering clutch parts | Clutch facings, springs, pressure plates | Same drivetrain as 350B Dozer. |
| Operator seat | Vintage tractor seat with mount | Universal vintage tractor seats fit with adapter brackets. |
For 350B Loader parts inventory and cross-fit confirmation, browse the John Deere Dozer Parts hub or contact our parts desk directly.
Working on a John Deere 350B Crawler Loader?
The 350B Loader shares chassis with the 350B Dozer but uses loader-specific bucket and hydraulic hardware. Our specialists can verify dozer vs. loader fitment by serial.
Mon – Fri, 7:00 AM – 5:00 PM CT
Request a PartWhy the 350B Loader is still in service
The 350B Loader continues to serve small farm operators, orchard maintenance crews, hobby restorers, and light commercial users. Refined hydraulics over the original 350 Loader, John Deere 3-cyl diesel reliability, and simple mechanical drivetrain make the 350B Loader a practical compact tracked loader for light work.
