Part of the Case Repair Manuals.
Need the factory service data for your Case CK25 or CK28? This 288-page Crawler Excavator Service Manual (OEM #Lep 7-37912GB) walks through every system on both machines, from engine tear-down to upperstructure hydraulics. Inside: wiring schematics for the alternator and starter circuits, hydraulic schematics covering the main pump, swing motor, and full pilot circuit, and a dedicated troubleshooting section for chasing electrical and hydraulic faults. Torque tables run across every assembly. Fill the CK25 engine with 4 litres of oil (5.3 for the CK28) and torque M10 Grade 7 fasteners to 48.0-55.9 Nm before you close anything up. Your machine is down. Get the factory number on the first try, not a forum guess. Opens on any device; bookmarked for instant section jumps.
What's Inside This Case CK25, CK28 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-26 | Safety, General Information, Torque Specifications, General Specifications |
| Engine | 27-66 | Engine Removal, Installation, Engine Disassembly, Assembly, Lubrication System, Cooling System, Fuel System |
| Electrical | 67-94 | Electrical Troubleshooting, Schematics, Alternator, Starter Motor |
| Undercarriage | 95-110 | Tracks, Rollers, Idlers |
| Power Train | 111-138 | Travel Motor, Reduction, Swing Reduction Gear |
| Undercarriage Hydraulics | 139-142 | Hydraulic Swivel |
| Upperstructure Hydraulics | 143-252 | Pressure Setting, Troubleshooting, Hydraulic Schematics, Hydraulic Reservoir, Main Hydraulic Pump, Hydraulic Pilot Pump, Swing Motor, Hand Control Valve |
| Upperstructure/ a It Achments | 253-288 | Upperstructure, Turntable Bearing, Boom, Dipper, Bucket, Dozer Blade, Pedals, Levers |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Standard Fastener Torque (M10, Grade 7) | 48.0 to 55.9 Nm | p. 8 |
| Hydraulic Hose Fitting Torque (1/8" Nuts) | 7.80 to 11.80 Nm | p. 9 |
| Cooling System Capacity | 4 Litres | p. 28 |
| Alternator Maximum Output | 480 watts | p. 69 |
| Starter Motor Nominal Output | 1.4 kW | p. 69 |
| Track Tension (Rubber Tracks) | 10 to 15 mm | p. 97 |
| Travel Motor Oil Capacity | 0.5 Litres | p. 112 |
| Swing Reduction Gearbox Oil Capacity | 1.3 Litres | p. 134 |
| Boom Cylinder Piston Rod Nut Torque | 785 Nm | p. 241 |
| CK25 | ||
| Engine Oil Capacity | 4 Litres | p. 28 |
| Hydraulic Oil Reservoir Capacity | 25 Litres | p. 172 |
| CK28 | ||
| Engine Oil Capacity | 5.3 Litres | p. 28 |
Case CK25, CK28 Common Problems This Manual Covers
Case CK25 engine fails to turn over when the ignition switch is engaged in cold weather. p. 70
Inspect the battery connections and test the starter motor nominal output, which must measure 1.4 kW. Review the troubleshooting procedures on page 70 for voltage drop tests. Clean all terminals and tighten the M10 grounding fasteners to 48.0 to 55.9 Nm.
Manual Section: Electrical TroubleshootingExcavator pulls to one side during forward travel or throws tracks in muddy terrain. p. 97
Check the undercarriage components for packed mud and verify track tension on page 97. Adjust the grease cylinder until the rubber track sag measures 10 to 15 mm at the center roller. Drain and refill the travel motor with exactly 0.5 Litres of oil.
Manual Section: UndercarriageBoom cylinder drops too fast under load or hydraulic power feels insufficient during heavy lifting.
Inspect the hydraulic schematic for holding valve locations. Check the rod seals for bypass and verify the boom cylinder piston rod nut torque is exactly 785 Nm as shown on page 241. Tighten any loose 1/8 inch hydraulic hose nuts to 7.80 to 11.80 Nm.
Manual Section: Upperstructure HydraulicsGrinding noise heard from the upperstructure and machine exhibits no swing movement when commanded. p. 134
Drain the swing reduction gearbox and inspect the fluid for metal shavings. Refill the assembly with 1.3 Litres of fresh gear oil as specified on page 134. Test the pilot control valve output pressure and ensure the swing brake release circuit functions correctly.
Manual Section: Swing System TroubleshootingFrequently Asked Questions
Torque specs for final drive bolts on Case CK28 mini excavator?
For the Case CK28 mini excavator, the Drive Sprocket Retaining Bolts should be tightened to a torque of 77 to 91 Nm. This specification is found in the 'SPECIAL TORQUES' section under 'TRAVEL MOTOR AND REDUCTION'.
Torque specs for engine mounting bolts on Case CK25 crawler excavator
The engine mounting bolts for the Case CK25 crawler excavator have specific torque requirements: M10 bolts should be tightened to 48 to 56 Nm, M12 bolts to 77 to 90 Nm, and M14 bolts to 124 to 147 Nm. These specifications are crucial for proper engine installation.
How do you fix case CK25 engine fails to turn over when the ignition switch is engaged in cold weather?
Inspect the battery connections and test the starter motor nominal output, which must measure 1.4 kW. Review the troubleshooting procedures on page 70 for voltage drop tests. Clean all terminals and tighten the M10 grounding fasteners to 48.0 to 55.9 Nm.
How do you fix excavator pulls to one side during forward travel or throws tracks in muddy terrain?
Check the undercarriage components for packed mud and verify track tension on page 97. Adjust the grease cylinder until the rubber track sag measures 10 to 15 mm at the center roller. Drain and refill the travel motor with exactly 0.5 Litres of oil.
How will I receive this Service Manual?
You get a 288-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print specific sections of this Service Manual?
The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
Can I find wiring schematics in this Case CK25, CK28 manual?
Yes, this Case CK25, CK28 Service Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
Reviews
There are no reviews yet.