Description

FIAT Kobelco SL45B, SL55BH 2002 Workshop Manual

You have a SL45B or SL55BH on the lift, customer clock ticking, and some third-party PDF tells you the head bolts get 45 ft-lbs. That number is garbage. I have pulled wrenches for 28 years, and I have seen more stripped threads from aftermarket manuals than from bad parts. The FIAT Kobelco SL45B, SL55BH 2002 Workshop Manual – 754 pages of factory print, not a photocopy of a photocopy – is what you put on the bench when you need real numbers. No fluff, no reprints, just OEM data from the day the machine left the factory.

Engine Overhaul: N844 and N844T Specs

Section 10 covers the engine chapter by chapter. The SL45B runs the N844 naturally aspirated; the SL55BH gets the N844T turbo. Page 1 identifies both models. The manual walks through the entire disassembly sequence – from valve seat to oil pump to timing gear. You get the spill-timing procedure for the injection pump, turbocharger removal steps, and the service standards for piston ring gaps and bearing clearances. Engine torque specifications are printed in Section 10 – not guessed, not interpolated from a different engine. Use those numbers or buy new bolts later.

4 Critical Sections in the Table of Contents

This is not a generic repair guide. The index splits into four main areas you need:

SECTION 00 – General Information: safety precautions, minimum hardware tightening torques, standard torque data for hydraulic tubes and fittings, boom lock pin procedures, cab tilting, craning specs.

SECTION 10 – Engine: full rebuild of N844/N844T, cooling system, fuel system, governor adjustment, turbocharger.

SECTION 27 – Rear Drive Axle: gearboxes removal, disassembly, inspection, reassembly. TROUBLESHOOTING included.

SECTION 29 – Hydrostatic Transmission: neutralizer, pumps, motors. Charge system pressure test, pump efficiency test, motor case drain test, air ingress test – all with pass/fail numbers.

Where Do You Find the Torque Data?

Right up front in Section 00. Minimum hardware tightening torques are listed in a table. Then you get separate specs for O-ring bosses, pipe thread fittings, and hydraulic tube fittings. Page 3 of the manual even tells you to contact FIAT KOBELCO if you spot a discrepancy. That is the level of quality you are paying for. After the general torque section, Section 10 has its own dedicated torque tables for the engine. No cross-referencing to a separate book. Everything is in one 754-page binder.

Does the Manual Cover the Hydrostatic Transmission?

Yes, and it does it right. Section 29 gives you the hydrostatic drive system testing procedure step by step. You will find the charge pressure test, pump case drain test, high-pressure test, and efficiency test for both pump and motor. There is even an air ingress test for the hydraulic system. If you need to remove the hydrostatic pump or motor, the manual has the disassembly sequence, parts inspection criteria, and reassembly steps. For general transmission theory, you can reference an external resource on Manual Transmission, but for the actual SL45B/SL55BH pump and motor, use the factory data.

Source Authenticity: Why OEM Beats Aftermarket

This is a genuine FIAT KOBELCO Workshop Manual, printed July 2002 in Italy. The OCR excerpt shows the official print number 604.06.923.01. The manual states it is intended for a skilled technician, but if you are a home garage guy who reads torque specs twice, you will survive. Aftermarket manuals often omit the “PROPERLY SUPPORT A RAISED MACHINE” and “PROPERLY SUPPORT BOOM ON BOOM LOCK PINS” sections – the exact pages where you learn how not to kill yourself. This manual has them. Do not trust a reprint that leaves out safety procedures.

Get the Right Torque Data

Skip the YouTube guesses. Open Section 00, find the “MINIMUM HARDWARE TIGHTENING TORQUES” heading, and put a clicker on the page. Then flip to Section 10 for engine-specific numbers. Use the same torque wrench you use for everything else; the manual does not change the spec. For an explanation of how torque works on a Manual Transmission, you can look that up elsewhere. For the SL45B or SL55BH, this manual is the only source you need.

Frequently Asked Questions

How many pages does this manual have?

754.

Does it include torque specs for the engine?

Yes. Section 00 lists minimum hardware tightening torques, and Section 10 has its own torque specifications for the N844 and N844T engines. The data covers main bearing cap bolts, connecting rod bolts, cylinder head bolts, and more. Always reference the factory table, not a guess from a forum.

Will this help me rebuild the hydrostatic transmission?

Section 29 provides the complete teardown, inspection, and reassembly for both pumps and motors. It includes the hydrostatic charge system pressure test procedure and pump efficiency test – you can confirm your pump is worn without replacing parts blind.

Is this a reprint or an aftermarket copy?

This is a factory-original workshop manual from FIAT KOBELCO, printed in 2002. It is not a scanned copy, not a third-party compilation. The document you access is the same one the dealership technicians used. Aftermarket manuals often omit safety procedures like PROPERLY SUPPORT A RAISED MACHINE (Section 00). This one includes every page, every torque spec, every warning.

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If you own these machines, stop running on bad data. Access the Factory Manual from AutoRepairManuals and get the real torque values, real wiring diagrams, and real procedures. Your engine – and your wallet – will thank you.