Description

Komatsu PC650-5, PC650SE-5, PC650LC-5, PC710-5, PC710SE-5 1996 Workshop Manual

If you have ever had a Komatsu PC650-5 or PC710-5 series machine on your rack with a hydraulic system that will not build pressure or a travel motor that pulls hard to one side, you know the cost of guessing. Generic aftermarket manuals leave out the exact test pressures and the sequence of events the ECM expects. This is the factory 1996 Workshop Manual – 734 pages of what Komatsu actually wrote. Not a condensed rewrite. Not a third-party scan. This is the document the factory techs had on their benches. It covers the PC650-5, PC650SE-5, PC650LC-5, PC710-5, and PC710SE-5. Every page of this OEM manual matters.

Structure and Function: Hydraulic Circuit Diagrams and Pump Locations

Turn to page 10-1 and you get the full breakdown: No.1 pump, No.2 pump, swing pump, charging and PTO lubricating pump – all with exploded assembly drawings. The hydraulic circuit diagram is included as a fold-out-style schematic, not a compressed JPEG. You can trace the flow from the tank through the L.H. 5-spool control valve and R.H. 4-spool control valve. The manual shows exactly where the safety lock valve and accumulator sit. If you are chasing a swing brake issue, the swing motor section on page 10-50 (approximate) gives you the internal seal arrangement and the control relief valve specs. That is the difference between a two-hour diagnosis and a two-day tear-down.

Does the Manual Cover the Electrical System?

It does. The electrical wiring diagram and electrical circuit diagram are both in section 10, right after the hydraulics. The manual includes connector pin number tables and the self-diagnostic display of the controller. You get the full troubleshooting tree for E-mode (electrical system) – E-1 through E-13 – covering everything from excessive travel deviation to engine not stopping. There is a judgment table that tells you whether a symptom is electrical or hydraulic/mechanical. That stops you from replacing a solenoid when the real problem is a worn control valve spool.

3 Key Test Procedures You Will Use Repeatedly

Section 20 (Testing and Adjusting) is about 100 pages of pure procedure. You need to measure engine speed? There is a tool list. Adjust valve clearance? The manual lists the intake and exhaust clearance by component. Test work equipment circuit pressure? The standard value table gives the pressure in psi. Check control circuit pressure? Same. The manual even tells you how to bleed air from the hydraulic circuit and release remaining pressure safely. Do not skip the release step – I have seen lines blow off because someone cracked a fitting with 5000 psi still trapped.

Get the Torque Specs from the Factory, Not Aftermarket

The table of judgement standard values and the maintenance standard section (40 MAINTENANCE STANDARD) contain the actual OEM torque figures for track shoe bolts, final drive bolts, swing circle bolts, and control valve mounting. These are the numbers Komatsu revised in the 1996 rev (see the list of revised pages with mark • and ( ) ). Aftermarket manuals often carry over torque values from earlier models that do not match the updated fasteners. This manual gives you the exact spec for your PC650SE-5 or PC710SE-5. Use it or risk a loose idler cushion.

Valve Adjustments: Following the Factory Procedure

The subsection “ADJUSTING VALVE CLEARANCE” is in section 20. It lists the specific sequence and feeler gauge thickness. It also tells you which valves to adjust on which stroke using the flywheel timing marks. Do not try to shortcut this with a generic “turn until snug” method. The manual includes a blow-by pressure test and compression pressure measurement that let you confirm the valve adjustment actually corrected the issue. That is the level of detail you get from 734 pages of original documentation.

Factory data. No substitutes.

Related manuals from our collection: Komatsu PC650-5 PC710-5 1996 Service Manual covers the same models. If you work on wheel loaders, the Komatsu WA65-5 WA70-5 WA80-5 2005 Workshop Manual uses a similar control architecture. For backhoe loaders, the Komatsu WH609-1E0 WH613-1E0 WH713-1E0 WH714H-1E0 WH716-1E0 Workshop Manual is another factory reference. External authority information on Manual Transmission and Manual Transmission is not relevant here – stick with the factory hydraulics.

What models does this manual cover?

Komatsu PC650-5, PC650SE-5, PC650LC-5, PC710-5, PC710SE-5 – all 1996 production.

Can I use this manual for a PC650-3?

No. The electrical system changed entirely with the -5 series. Using this manual on an earlier model will shut down your machine via the controller. Buy the right manual.

Does the manual include bolt torque for the swing motor?

Yes. The maintenance standard section lists torque for the swing motor mounting bolts and the swing circle bearing bolts. Look under “40 MAINTENANCE STANDARD” or the “TABLE OF JUDGEMENT STANDARD VALUE”.

How do I check the hydraulic pressure on the PC710SE-5?

Section 20, “TESTING AND ADJUSTING WORK EQUIPMENT, SWING, TRAVEL CIRCUIT PRESSURE” gives the procedure, required gauges (see tools list), and the standard pressure range. You will need a 6000 psi gauge and the test port adapter referenced in the hydraulic unit location page.

Stop wasting billable time on generic diagrams. Access the Factory Manual today and get the exact test pressures, valve clearances, and wiring pinouts that Komatsu factory techs used. Your shop will thank you when the machine leaves the bay running right the first time.