Case 1845C Specifications & Workshop Service Guide
The Case 1845C is a skid steer loader produced during 1985-2001, powered by a 57-horsepower Case 4-390 / Cummins 4B3.9 Naturally Aspirated diesel engine. It features an operating weight of 6,185 lbs (2,805 kg), a rated operating capacity of 1,750 lbs (794 kg, SAE J818), and an auxiliary hydraulic flow of 16.0 GPM at 2300 PSI (21.5 HHP).
Engine & Powertrain
- Engine Model
- Case 4-390 / Cummins 4B3.9 Naturally Aspirated
- Gross Output
- 57 HP
- Crankcase Oil
- 11.0 qts (15W-40 Heavy Duty Diesel (API CK-4))
- Cooling System
- 13.0 qts (50/50 Ethylene Glycol)
Hydraulic Circuit & Flow
- Auxiliary Flow
- 16.0 GPM (Standard Flow)
- Relief Pressure
- 2300 PSI
- Hydraulic HP
- 21.5 HHP (GPM × PSI / 1714)
- Reservoir Capacity
- 13.0 US Gal (Case Akcela Hy-Tran Ultra Action / ISO VG 46 Anti-Wear)
- Total System Vol
- 17.5 US Gal (Includes cylinders)
- Drive Chain Case
- 8.0 US Gal (SAE 10W-30 or Case TCH Fluid (Separate Compartments))
Wix / Donaldson OEM Filter Cross-Reference
Standard fluid and filter change requires exactly 13.0 US gallons to reach the center of the sight glass. Never overfill.
Hydraulic cylinders and lines hold approximately 4.5 US gallons. Total system capacity for dry rebuilds is 17.5 US gallons.
The chain case holds 8.0 US gallons of SAE 10W-30 or Case TCH Fluid (Separate Compartments). It is completely isolated from the hydraulic circuit.
Case 1845C Technical Service Overview
Field service operations on the Case 1845C 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 1845C Rated Operating Capacity | SAE J818 Technical Specification Standard ↗ | 1,750 lbs (794 kg) | |
| Factory Service Manual Publication | Case Equipment Corporation Service Manual #8-42211 (Hydraulics & Tandem Pumps) | Verified Factory Documentation | |
| Hydraulic Reservoir Service Capacity | Case 1845C Lubrication Specification Table | 13.0 US Gallons (Case Akcela Hy-Tran Ultra Action / ISO VG 46 Anti-Wear) | |
| Case 4-390 / Cummins 4B3.9 Naturally Aspirated Engine Output | Engine Manufacturer Service & Workshop Data | 57 Gross HP (11.0 qts 15W-40 Heavy Duty Diesel (API CK-4)) |
Frequently Asked Technical Questions
Authoritative mechanical and operational answers verified against OEM shop manuals.
What is the rated operating capacity (ROC) of the Case 1845C?
Under SAE J818 standards (50% of tipping load for wheeled loaders or 35% for tracked loaders), the Case 1845C has a Rated Operating Capacity of 1,750 lbs (794 kg). The static tipping load is 3,545 lbs (1,608 kg). Always operate within rated parameters to prevent rollover hazards.
What hydraulic fluid and reservoir capacity does the Case 1845C use?
The Case 1845C hydraulic reservoir requires 13.0 US gallons (49.2 Liters) of Case Akcela Hy-Tran Ultra Action / ISO VG 46 Anti-Wear. The complete system capacity with cylinders and coolers holds 17.5 US gallons.
What engine powers the Case 1845C and what are the service intervals?
The Case 1845C is powered by a Case 4-390 / Cummins 4B3.9 Naturally Aspirated diesel producing 57 gross horsepower. The crankcase requires 11.0 quarts (10.4 Liters) of 15W-40 Heavy Duty Diesel (API CK-4). Oil changes are recommended every 100 to 250 operating hours based on duty cycle.
Where is the serial number located on the Case 1845C?
Left side mainframe stamped tag located beneath lift cylinder tower pivot.
What Wix filters fit the Case 1845C?
Primary cross-references for the Case 1845C 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.