Model Spotlight

Case 350 Crawler Dozer: Specs, Parts & Common Issues

The compact dozer that anchored Case's small-class crawler lineup for two decades. Case 188D 4-cylinder diesel — 188 cu in / 3.1 L, approximately 44 HP gross — paired with a Case power shuttle transmission and outboard final drives. Designed for grading, clearing, foundation work, and finish work on small-to-medium jobsites. Shares major service parts with the Case 310 / 310G predecessor and 350B successor.

BT

Broken Tractor Editorial Team• Updated May 2026• 10 min read

The Case 350 is the compact crawler dozer that anchored Case's small-class lineup from the late 1950s through the early 1970s. Powered by the Case 188D — a 188 cubic inch (3.1 L) four-cylinder diesel rated at approximately 44 HP gross — paired with a Case power shuttle transmission and outboard-planetary final drives, the 350 was sized for small-to-medium grading, clearing, foundation, and finish work. It's the direct successor to the Case 310 / 310G in the small-crawler line and the predecessor to the 350B (which took over the same chassis with refinements through 1979).

For owners maintaining a 350 today, the most useful single fact is that most service parts — undercarriage, final drives, track adjusters, blade hardware, power shuttle internals — cross-fit either to the earlier Case 310 / 310G or to the later 350B. That cross-reference network is broad enough that almost every common wear item on a 350 is currently sourceable through the BigCommerce catalog at Broken Tractor.

At-a-glance specifications

Case 188D diesel engine

The Case 188D is a 188 cubic inch (3.1 L) four-cylinder direct-injection diesel that became one of Case's most widely used industrial small-block engines. The same engine family powered the smaller Case loader-backhoes (480CK, 480D, 580CK, 580B), the W3 / W5 wheel loaders, and the 350 / 310 / 310G crawler dozers. Bore × stroke is 3.625 × 4.50 in (92 × 114 mm) with a Bosch in-line injection pump.

Practical implications for the Case 350 owner:

• Engine parts ecosystem is broad. Pistons, rings, bearings, head gasket sets, water pumps, and oil pumps source readily through Case 188D service catalogs — these are not 350-specific parts.
• Injection pump rebuild at a qualified diesel-pump shop is the standard fix when fuel delivery degrades. Symptoms: hard starting, rough idle, smoking, power loss.
• Head gasket failure is the most common cylinder-head service item on these engines after 50-plus years. Pre-combustion chamber cracks, gasket failure between cylinders, or warpage from past overheating events are all common items on unrestored engines.
• Cooling system — the R34163 radiator is a documented 350-specific replacement part. Internal corrosion in the original cores is the most common cause of overheating complaints.

Power shuttle transmission

The Case Power Shuttle on the 350 is a hydraulically actuated forward/reverse system with a multi-disc clutch pack on each side of the direction-change assembly. The operator selects direction with a column-mounted shuttle lever rather than working a foot clutch, which makes rapid forward/reverse cycling (essential for dozer work) much faster than a manual transmission would allow.

The Case Power Shuttle is durable but does wear — clutch packs lose grip over time, the shuttle control valve gets sticky, and seal degradation eventually causes pressure drops. Two complete rebuild kits are in the catalog:

• A574020 — Case 350 Dozer (Early) Shuttle Rebuild Kit for early-production 350 power shuttle units
• A574008 — Case 350 / 350B Power Shuttle Transmission Rebuild Kit for late-production 350 and the later 350B

Confirm your unit type by serial number before ordering — the early and late shuttle internals differ in several wear components.

Track and undercarriage

Track adjusters, recoil springs, and rollers wear over decades of service. The 350's undercarriage is a sealed-and-lubricated chain with grouser plates. The Case 350 shares most undercarriage components with the 310 / 310G predecessor and the 350B successor, which gives the 350 owner a wide service-parts pool.

• D42202 — Hydraulic Track Tension Adjuster for 310 and 350
• D42199 — Track Adjuster Tube for 310G, 350, 350B
• D43510 — Track Adjuster Mounting Bracket for 310, 350, 350B
• D43513 — Track Adjuster Recoil Spring Shield
• R46068 — Track Recoil Spring Assembly for 350 / 350B
• R48241 — Track Adjuster Rod for 310, 350
• D43509 — Idler Guide Plate for 310, 350, 350B
• D42198 — Top Roller Bracket for 310G, 350, 350B (1-1/4" shaft)
• CA111/10, CA111/12, CA111/14 — 10", 12", and 14" Single Grouser Track Shoes for Case 310 & 350
• CA111BK — Track Shoe Bolt & Nut Kit (7/16")
• CA312 — Track Master Pin

That cross-reference list represents one of the broader undercarriage parts inventories available for any Case small crawler of the era. Track work on a 350 does not need to involve searching obscure suppliers — most parts are in stock.

Final drives

The Case 350's outboard-planetary final drives are a known wear point on machines with high hours. The major service components are available at Broken Tractor with cross-fit to the 310 / 310G and 350B:

• CS-350-FDK — Late 310G / 350 / 350B Final Drive Bearing and Seal Kit — the rebuild kit for the final drive itself
• 11853 — Final Drive Sprocket Shaft for 310, 350, 350B
• D29125 — Final Drive Axle Washer for 310, 350, 350B
• D32730 — Final Drive Pinion Coupler (10-spline) for 310 & 350
• D43359 — Final Drive Seal Carrier for 310G, 350, 350B
• 11410 — Left Differential Carrier for 310 & 350

Symptoms of final drive wear: clicking under load, oil weeps at the hub seal, audible bearing rumble. Service requires pulling the wheel and dropping the planet carrier — significant work but supported by the in-stock rebuild kit.

Blade and cutting edges

The 350 was offered with straight, angle, and tilt blade configurations. Cutting edges wear with use — particularly on rocky ground or in heavy clay. The R24492 center blade cutting edge is in stock and cross-fits both the 350 and the 350B.

Rock guards and protection

Several rock-guard items are available at Broken Tractor for the 350. These are particularly relevant if you operate in rocky or wooded terrain:

• PV620 — Track Rock Guard Set for 350 / 310G (after S/N 3039619)
• R44053 — Front Rock Guard (RH outer or LH inner)
• R44054 — Front Rock Guard (LH outer or RH inner)
• D43598 — Left Rear Guard for 350 / 310G after S/N 3039619
• D43599 — Right Rear Guard for 350 / 310G after S/N 3039619

Parts we carry

The list below is a sample of the Case 350 service parts with confirmed fitment at Broken Tractor. These are the items that have come up most often in service inquiries over the past year.

For a comprehensive Case 350 parts search, browse the Case Dozer Specs and Information hub or contact our parts team for serial-number-specific verification.

Common issues and what to expect

188D engine wear after 50-plus years

The Case 188D is durable but well past expected service life on any original-engine machine. Common items: head gasket failure (typically between cylinders or weeping at the deck), pre-combustion chamber cracks, valve seat recession on heavy-duty service, and injection pump wear. Plan on a full top-end rebuild as a baseline restoration step on any unrestored 350.

Power shuttle slipping or harsh engagement

The hydraulically actuated power shuttle clutch packs wear with age. Symptoms: harsh forward-to-reverse changes, slow engagement, or full slippage under load. The A574020 (early) or A574008 (late) rebuild kit covers the wear components. Confirm the unit type by serial number before ordering.

Track and undercarriage wear

Track adjuster spring fatigue, master pin elongation, idler bushing wear, and final drive sprocket chord wear all develop over decades of service. Every major undercarriage wear item on the 350 is available at Broken Tractor.

Hydraulic cylinder seal failure

Every blade hydraulic cylinder on a 350 has seals that are 50-plus years old. Plan on rebuilding every cylinder as part of any restoration. Bores are typically still good; reseal kits are available — contact our parts team for current fitment options.

Final drive hub seal weeps

The final drive hub seal is a common service item on high-hour 350s. The CS-350-FDK rebuild kit covers the seal along with the bearings. Symptoms: oil drips from the hub area, declining gear oil level in the final drive, or audible bearing rumble.

Electrical and ignition aging

The 350's electrical system is simple — 12V starting, basic gauge cluster, mechanical controls. But the harness is 50-plus years old and corrosion at connectors, switches, and ground points is routine. Most "won't start" complaints on a 350 trace back to electrical rather than mechanical issues.

Where it sits in the Case dozer family

The Case 350 anchors the small end of Case's crawler dozer lineup of the 1960s and 1970s. Above it sat the 450, then the 550, 650, 750, 850, and 1150 progressively larger crawlers. Below it was the 310 / 310G — the smaller-frame Case crawler dozer that shared the same engine family and many undercarriage components with the 350. The 350B took over the 350's chassis with refinements through 1979 before the Case 450B replaced the small-class crawler in 1978.