1998 Isuzu FSR FTR FVR Commercial Truck Service Manual – Book 2 of 3

Description

1998 Isuzu FSR FTR FVR Commercial Truck Service Manual – Book 2 of 3

When you are working on a 1998 Isuzu FSR, FTR, or FVR medium duty truck equipped with the 6HK1 engine, having the correct service information is not optional. This 1998 Isuzu FSR FTR FVR Commercial Truck Service Manual Book 2 of 3 delivers the diagnostic procedures, repair instructions, torque values, and component specifications that Isuzu published for these trucks, focused entirely on the steering, suspension, driveline, axle, and brake systems.

File Details

• Manual Type: Commercial Truck Service Manual, Volume 2 of 3
• Brand: Isuzu
• Models Covered: FSR, FTR, FVR
• Engine: 6HK1
• Model Year: 1998
• Publisher: Isuzu Motors America, Inc.
• Information Cutoff Date: December 1, 1997
• Language: English
• File Format: PDF
• Page Count: Approximately 800 pages

What This Volume Covers

Book 2 of 3 breaks down into four complete sections. Every section follows the same structure: specifications first, then diagnostic information and procedures, then repair instructions with removal and installation steps, and finally descriptions of how each system operates. This is the layout that lets a technician move from symptom to diagnosis to repair without guessing.

Section 2 — Steering

The steering section opens with the integral power steering system, covering the full diagnostic process for noise, effort, and returnability complaints. You get the power steering system test procedure using a flow meter and pressure gauge, along with the specific values to compare against. Repair procedures walk through pump replacement, complete pump assembly for both air brake and hydraulic brake configurations, system bleeding, flushing, hose replacement, gear replacement, sector shaft dust cap, input shaft dust cap, bearing protector cap, end limiters, pressure relief valve, resection valve, and reservoir replacement.

Steering linkage (non-rack and pinion) gets its own coverage: inspection criteria, tie rod replacement, steering arm replacement, tie rod arm replacement, relay rod replacement, and pitman arm replacement. The steering wheel and column section handles the tilt column, including ignition switch replacement, multifunction turn signal lever, tilt lever, steering wheel, and both upper and lower steering shaft assemblies.

Section 3 — Suspension

This section begins with suspension general diagnosis — the kind of organized symptom-to-cause tables that save hours. Vehicle lead/pull, bottoming, abnormal tire wear, wander, poor steering stability, noisy front suspension, tire hop, excessive road shock, shock absorber binding, spring noise, spring sag, spring breakage, front wheel shimmy, hard steering, and wheel bearing diagnosis are all covered. The wheel bearing diagnosis portion uses detailed illustrations to help identify abrasive wear, galling, etching, bent cages, indentations, fretage, smears, stain discoloration, misalignment, and fatigue spalling.

Wheel alignment follows with the specifications and adjustment procedures for caster, camber, toe, king pin inclination, and stop screw adjustment. Front suspension repair covers stabilizer shaft, steering knuckle and king pin, spring bumper, leaf springs, wheel hub/bearing/seal for both drum and disc brakes, hub cap, wheel bearing adjustment, shock absorber, king pin bushing and bearing cup, king pin upper bearing repack, king pin bearing preload, and front axle replacement. The rear suspension section covers spring maintenance, stabilizer shaft, shock absorber, spring bushing, leaf spring, spring leaf, spring hanger, and spring bumper. Tires and wheels get thorough treatment: wheel mounting surface checks, hub bolt and nut, rim/hub bolt checks, aluminum wheel refinishing, clearcoat damage, wheel removal and installation for front and dual/rear, tire mounting and dismounting, rotation, matching, measuring, valve core and cap replacement, and full descriptions of tires, tire repair, inflation, load range/ply rating, and wheels.

Section 4 — Driveline/Axle

The propeller shaft section covers roughness and vibration diagnosis, runout checks, visual inspection, ping/snap/click noise diagnosis, driveline angle adjustment, and a comprehensive set of replacement procedures organized by configuration — one-piece, two-piece, and three-piece shafts with full yoke, half yoke, outboard slip, inboard slip, inboard flange, and center bearing variations. Component-level repair includes slip joint replacement, center bearing replacement, yoke replacement, universal joints replacement, and lubrication procedures. Descriptions cover propeller shaft phasing, universal joints, and center bearing function.

Rear drive axle coverage includes noise diagnosis with detailed guidance on determining noise type, gear noise versus bearing noise, and external noise sources that can be mistaken for axle problems. Repair procedures cover lubricant change, differential replacement, axle shaft replacement, drive pinion yoke replacement, vent hose replacement, rear hub and bearing replacement (hub and bearing, wheel bearing cup, and wheel bearing seal), axle housing replacement, wheel bearing adjustment, and wheel hub bolt replacement. Rear axle descriptions cover single-speed, two-speed, and tandem axles.

Rear axle controls covers the two-speed rear axle shift system: component locations, connector end views, system checks, shift motor diagnosis for both high-speed and low-speed inoperative conditions, shift control switch replacement, shift motor relay replacement, and shift motor replacement. Circuit descriptions explain how the two-speed axle electrical system operates.

Section 5 — Brakes

This is the largest section of the book. Hydraulic brakes covers specifications, schematics, component locations, and a long list of diagnostic procedures including brake warning indicator, AUX BRAKE indicator and alarm, brake pedal effort, fluid leaks, pump and booster leaks, master cylinder diagnosis, and hydraulic system fluid loss. Repair procedures include master cylinder reservoir filling, master cylinder replacement and bench bleeding, fluid level sensor, brake pedal, pipe replacement, hose replacement front and rear, ISO flares, brake hose replacement, system bleeding (manual and pressure), flushing, hydraulic brake booster replacement, electrohydraulic pump replacement, fluid flow switch, and stoplamp switch. Descriptions explain the hydraulic brake booster, brake warning system circuits, and both primary and auxiliary brake lamp operation.

Disc brakes covers specifications, brake lathe specs, component specs, rotor thickness variation, lateral runout, tolerance, pad inspection, pad replacement for front and rear (Bendix and Dayton-Walther), burnishing, caliper replacement, caliper and anchor plate wear adjustment for multiple configurations, caliper overhaul, and mounting plate replacement. System descriptions for front and rear disc brakes explain operation.

Park brake covers specifications (electric/hydraulic), shoe replacement for Bendix 229mm (9 in) and 254mm (10 in), shoe inspection, shoe adjustment, lubrication, lever replacement, lever adjustment, warning lamp switch, cable replacement, cable inspection, brake drum replacement for both sizes, drum inspection, support replacement, and bellcrank and cam lever replacement.

Air brakes is an extensive subsystem within Section 5. It begins with specifications and continues through schematics (air brake system, air brake dryer, park brake control, park brake), component locations, and dozens of diagnostic procedures — air brakes inoperative, not operating properly, slow application, pressure loss, safety valve blowing off, uneven braking, grinding, drag, dryer constantly cycling or purging, reservoirs containing water, dryer safety valve and purge valve issues, desiccant expulsion, system testing, primary brake indicator and alarm, low air pressure switch, stoplamp switch, trailer stoplamp switch, dryer testing, system leak test, park control valve tests (IP mounted and chassis mounted), trailer brake supply valve, reservoir check valve, double check valve, application valve, front air brake limit valve, front axle service reservoir air supply valve, moisture ejector valve, pressure protection valve, reservoir drain valve, quick release valve, rear quick release double check valve, relay valve, rear relay double check valve, primary supply reservoir safety valve, towing vehicle protection valve, trailer brake control valve, and air dryer/moisture ejector system check. Repair procedures cover draining and filling reservoirs, applying pipe sealant, pedal replacement, stoplamp switch replacement, trailer stoplamp switch replacement, hose and line replacement for nylon and metal compression, nylon push-in, flexible, trailer brake coupling, and trailer brake dummy cap configurations, reservoir replacement (supply, front service, truck rear service), reservoir support replacement, drain valve replacement (manual and automatic), low air pressure switch, air dryer, park control valve, trailer brake supply valve, reservoir check valve, double check valve, application valve, front air brake limit valve, front axle service reservoir air supply valve, pressure protection valve, quick release valve, rear quick release double check valve, relay valve, rear relay double check valve, primary supply reservoir safety valve, chassis mounted park control valve, towing vehicle protection valve, and trailer brake control valve.

Air drums covers specifications, component dimensional specs for front and rear brakes, system diagnosis, inspection, drum replacement, drum inspection and refinishing, cam brake assembly replacement, shoe inspection and replacement, camshaft replacement, automatic slack adjuster replacement (Rockwell and Eaton), chamber clevis replacement, chamber replacement, chamber overhaul (service and spring), caging the rear air brake chamber, and brake adjustment (pushrod stroke measurement and normal wear adjustment).

Air compressor covers specifications, mechanical specs, governor valve adjustment specs, diagnosis (compressor not unloading, compressor and governor valve), replacement, overhaul (disassembly/assembly, cleaning and inspection, tests after overhaul), governor valve replacement and adjustment, and descriptions of the compressor and governor operation.

Antilock brake system (hydraulic) covers specifications, BPMV hydraulic flow charts (normal braking, isolation, dump, reapply, brake release modes), schematic references and icons, schematics, component locations, component views, connector end views, self-diagnostics, DTC display and clearing, intermittents and poor connections, scan tool diagnosis, diagnostic system check, DTC list, and individual DTC diagnostics for every wheel speed sensor, EBCM control valve, relay, pump motor, dump/isolation time, EBCM malfunction, trim level, brake switch, and ABS indicator lamp circuit codes. Repair procedures include ABS bleed procedure, EBCM replacement, BPMV replacement, front and rear wheel speed sensor replacement, and tube adapter replacement. Descriptions cover service precautions, general system description, abbreviations, basic knowledge, system description, and system operation including normal braking, isolation, dump, reapply, and brake release modes.

Air antilock brake system covers specifications, schematic references and icons, schematics, component locations, component views, connector end views, self-diagnostics, intermittents and poor connections, air ABS diagnostic system check, diagnostic status lamp tables for left/right, front/rear, and mod/sens combinations, repair procedures for EBCM replacement, modulator valve replacement (front and rear), front and rear wheel speed sensor replacement, and descriptions covering service precautions, general system description, ABS system description, and ABS system operation including base braking, antilock braking, and self-test.

Why This Manual Matters for FSR, FTR, and FVR Owners and Technicians

The 1998 Isuzu FSR, FTR, and FVR trucks with the 6HK1 engine are work vehicles. They earn their keep every day, and when something goes wrong — a steering complaint, a brake warning light, a vibration at highway speed, an air system that will not build pressure — the technician needs the factory approach, not a generic guess. This manual gives you that approach.

The diagnostic sections are structured to lead you from the symptom to the cause. Whether you are chasing a power steering noise, a suspension pull, a driveline vibration, or an ABS code, the manual provides the test procedures, the values to compare against, and the repair steps that follow. The specifications are there when you need a torque value, a clearance limit, or a fluid capacity. The descriptions explain how each system is supposed to work, which makes it easier to recognize when something is not working correctly.

Because this is Book 2 of 3, it focuses entirely on steering, suspension, driveline/axle, and brakes. If you need engine, transmission, or body information, those are in the companion volumes. What you get here is deep, specific coverage of the chassis systems that keep the truck driving, stopping, and handling correctly.

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Instant PDF Delivery

This 1998 Isuzu FSR FTR FVR Commercial Truck Service Manual Book 2 of 3 is delivered as a PDF download immediately after purchase. There is no shipping, no waiting, and no physical book to store. You can access it on any device — laptop in the shop, tablet on the lift, or phone at the parts counter — and print the pages you need for the job at hand. Whether you are a professional technician, a fleet maintenance manager, or an owner-operator who does their own work, having the right service information on hand makes every repair more efficient and every diagnosis more accurate.