Case 1840 Specifications & Workshop Service Guide
The Case 1840 is a skid steer loader produced during 1989-2001, powered by a 51-horsepower Case/Cummins 4B-3.9 Diesel diesel engine. It features an operating weight of 5,450 lbs (2,472 kg), a rated operating capacity of 1,400 lbs (635 kg, SAE J818), and an auxiliary hydraulic flow of 15.5 GPM at 2300 PSI (20.8 HHP).
Engine & Powertrain
- Engine Model
- Case/Cummins 4B-3.9 Diesel
- Gross Output
- 51 HP
- Crankcase Oil
- 10.0 qts (15W-40 Diesel Motor Oil)
- Cooling System
- 12.0 qts (50/50 Ethylene Glycol)
Hydraulic Circuit & Flow
- Auxiliary Flow
- 15.5 GPM (Standard Flow)
- Relief Pressure
- 2300 PSI
- Hydraulic HP
- 20.8 HHP (GPM × PSI / 1714)
- Reservoir Capacity
- 9.0 US Gal (Case Akcela Hy-Tran Ultra / ISO VG 46)
- Total System Vol
- 12.0 US Gal (Includes cylinders)
- Drive Chain Case
- 7.0 US Gal (SAE 10W-30 Motor Oil)
Wix / Donaldson OEM Filter Cross-Reference
Standard fluid and filter change requires exactly 9.0 US gallons to reach the center of the sight glass. Never overfill.
Hydraulic cylinders and lines hold approximately 3.0 US gallons. Total system capacity for dry rebuilds is 12.0 US gallons.
The chain case holds 7.0 US gallons of SAE 10W-30 Motor Oil. It is completely isolated from the hydraulic circuit.
Case 1840 Technical Service Overview
Field service operations on the Case 1840 require adherence to manufacturer hydraulic pressure relief tolerances (2300 PSI) and torque specifications. When performing standard 250-hour preventative maintenance, always verify hydraulic filter condition, check drive chain tension, and inspect high-pressure auxiliary couplers for mechanical wear or weeping seals.
Empirical Engineering & Statutory Verification Matrix
All tolerances and fluid formulas cross-checked against primary heavy machinery standards.
| Engineering Parameter | Authoritative Source | Authority Body | Factory Tolerance / Rule |
|---|---|---|---|
| Case 1840 Rated Operating Capacity | SAE J818 Technical Specification Standard ↗ | 1,400 lbs (635 kg) | |
| Factory Service Manual Publication | Case Corporation Service Manual #8-11100 (Uni-Loader 4B3.9 Cummins) | Verified Factory Documentation | |
| Hydraulic Reservoir Service Capacity | Case 1840 Lubrication Specification Table | 9.0 US Gallons (Case Akcela Hy-Tran Ultra / ISO VG 46) | |
| Case/Cummins 4B-3.9 Diesel Engine Output | Engine Manufacturer Service & Workshop Data | 51 Gross HP (10.0 qts 15W-40 Diesel Motor Oil) |
Frequently Asked Technical Questions
Authoritative mechanical and operational answers verified against OEM shop manuals.
What is the rated operating capacity (ROC) of the Case 1840?
Under SAE J818 standards (50% of tipping load for wheeled loaders or 35% for tracked loaders), the Case 1840 has a Rated Operating Capacity of 1,400 lbs (635 kg). The static tipping load is 2,800 lbs (1,270 kg). Always operate within rated parameters to prevent rollover hazards.
What hydraulic fluid and reservoir capacity does the Case 1840 use?
The Case 1840 hydraulic reservoir requires 9.0 US gallons (34.1 Liters) of Case Akcela Hy-Tran Ultra / ISO VG 46. The complete system capacity with cylinders and coolers holds 12.0 US gallons.
What engine powers the Case 1840 and what are the service intervals?
The Case 1840 is powered by a Case/Cummins 4B-3.9 Diesel diesel producing 51 gross horsepower. The crankcase requires 10.0 quarts (9.5 Liters) of 15W-40 Diesel Motor Oil. Oil changes are recommended every 100 to 250 operating hours based on duty cycle.
Where is the serial number located on the Case 1840?
Chassis serial plate welded to rear upright post beneath lift arm.
What Wix filters fit the Case 1840?
Primary cross-references for the Case 1840 are: Engine Oil: Wix 51607 / Donaldson P558615; Hydraulic: Wix 51551 / Donaldson P551551; Fuel: Wix 33472 / Donaldson P550248; Outer Air: Wix 42478 / Donaldson P181052. Always verify thread pitch and seal diameter prior to spin-on installation.