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This is the factory repair manual for the Caterpillar 313B CR hydraulic excavator (serial prefix BAS, built roughly 1999-2004), the compact-radius machine with the Cat/Mitsubishi diesel. Inside you get actual teardown coverage: engine overhaul with air inlet, turbo, cooling and fuel systems; the main and pilot hydraulic pumps, control valves and boom/stick/bucket cylinders; swing parking brake and straight travel control; final drives, travel motors, front idler, recoil spring and track adjustment. There is a full disassembly and assembly section with required tooling listed, plus electrical and starting system coverage and the monitor panel. If your 313B CR is losing hydraulic power under load, running hot, or the swing is getting noisy, this is the book the dealer techs used.
Caterpillar 313B CR Common Problems This Manual Covers
Intermittent hydraulic power loss and overheating under heavy digging
Start with the pressure tests in the Hydraulic System section before condemning the main pump. A plugged hydraulic cooler or a worn control valve gives the same symptoms as a failing pump, and the manual's test sequence separates them with a gauge instead of a parts bill.
Manual Section: Hydraulic System & ImplementsSwing hesitation, grinding, or the house not holding position on a slope
Check swing pressure and the swing parking brake release per the Power Train section first. If pressures are good and the grinding continues, the Disassembly and Assembly section covers swing motor removal and swing bearing inspection, which is where worn bearings on high-hour machines show up.
Manual Section: Power Train - Swing & TravelEngine stalls after 30 plus minutes of running or refuses to restart hot
Follow the fuel system checks in the Engine section: filters, lines, and transfer pump, then the troubleshooting preparation steps to rule out electrical causes. Fuel contamination is a known complaint on these machines, and the manual shows the full fuel path so you can find where the restriction lives.
Manual Section: Engine, Air Inlet & CoolingTrack thrown, loose, or the front idler not holding tension
The Undercarriage section covers the recoil spring, front idler and track adjustment procedures. A weak recoil spring or a leaking track adjuster lets the track walk off in a turn, and the manual gives the correct service procedure including the warnings for the spring, which is under dangerous preload.
Manual Section: Undercarriage - Final Drives & TrackFrequently Asked Questions
My 313B CR loses hydraulic power or overheats during heavy digging. Will this manual help me trace it?
Yes, that is exactly what the Hydraulic System section is for. It walks the main pump, pilot pump, and control valve testing so you can tell a tired pump from a stuck relief valve or a plugged hydraulic cooler before you throw parts at it. On these machines the pump is expensive and the cooler cleanout is cheap, so test in the order the manual gives you.
Does it cover the swing bearing and swing motor? Mine grinds and hesitates.
The Power Train section covers the swing parking brake and swing drive, and the Disassembly and Assembly section covers pulling the swing motor and getting at the bearing. Grinding from the deck usually means the swing bearing is dry or worn, while hesitation points at swing pressure or the parking brake not fully releasing. The manual lets you check pressures first, which is the cheap test.
Are the final drives and track components included? I need to reseal a travel motor.
Yes. The Undercarriage section covers final drives, travel motors, front idler, recoil spring and track, with removal and installation procedures in the assembly section. Travel motor seals are one of the most replaced items on the 313B CR, and doing the job with the factory procedure instead of guessing at it saves you a second teardown.
Will this help with hard starting and stalling after the engine warms up?
The Engine and fuel system coverage plus the Troubleshooting section handle it. Warm stalling on these machines is usually fuel: contaminated tank, plugged filters, or a weak transfer pump, and the manual gives the checks in order. It also covers the starting and electrical system, so a no-crank condition is traceable with the same book.
Is this a PDF I can use in the shop, and does it cover the cab air conditioning?
It is a digital manual you can keep on a laptop or tablet at the machine and print pages from as you need them. And yes, there is a dedicated Air Conditioning and Cab Heating section covering the compressor, expansion valve, heater control panel and HVAC lines, which most aftermarket guides skip entirely.
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