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Yanmar ViO45-5, ViO45-5B, ViO55-5, ViO55-5B Excavator Service Manual

Yanmar ViO45-5, ViO45-5B, ViO55-5, ViO55-5B Excavator Service Manual

Name: Yanmar ViO45-5, ViO45-5B, ViO55-5, ViO55-5B Excavator Service Manual
SKU: YAN-VIO4555-SM-HD
Availability: InStock

Original price was: $34.95.Current price is: $21.95.

Professional service manual for Yanmar ViO45-5, ViO45-5B, ViO55-5, and ViO55-5B mini excavators. Includes technical specifications, servicing standards, tightening torques, dimensional working drawings, and hydraulic maintenance procedures.

SKU: YAN-VIO4555-SM-HD Category: Excavators Tags: Yanmar Excavator Repair Manual, Yanmar ViO45-5 Service Manual, Yanmar ViO45-5B ViO55-5B Workshop Manual, Yanmar ViO55-5 Service Manual Vendor: Air Conditioning Manuals

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Description
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Description

Official Workshop Technical Service Manual

Yanmar ViO45-5 & ViO55-5 Series Excavators

Models: ViO45-5 · ViO45-5B · ViO55-5 · ViO55-5B | Doc Ref: A470608

35 Pages · PDF
English Language
Instant Digital Download
Service Manual

This comprehensive service manual delivers the essential technical data, operational tolerances, adjustment standards, and workshop procedures required to maintain, service, and overhaul the Yanmar ViO45-5, ViO45-5B, ViO55-5, and ViO55-5B compact hydraulic excavators — covering both standard and B-series configurations powered by Yanmar 4TNV88-PBV and 4TNV88-BXBV direct-injection diesel engines across cabin and canopy variants.

Document & File Details

Manual Type	Service Manual
Brand	Yanmar
Equipment Type	Compact Hydraulic Excavator
Applicable Models	ViO45-5, ViO45-5B, ViO55-5, ViO55-5B
Engine Models	Yanmar 4TNV88-PBV, 4TNV88-BXBV (4-cyl water-cooled direct injection)
Serial Number Coverage	ViO45-5/5B: S/N 50501–50591 and S/N 50592+ ViO55-5/5B: S/N 50501–50800 and S/N 50801+
Document Reference	A470608
Language	English
Page Count	35 Pages
Format	Digital PDF — Instant Download

Chapters & Sections Covered

Chapter 1 — General Cautions for Maintenance Work

Correct work & operational fundamentals · Safety precautions & workshop guidelines · Preparations & tool inspection · Cautions for disassembly/reassembly · Hydraulic equipment removal/installation · Hydraulic piping cautions · Seals, O-rings & floating seals handling · Hydraulic hose installation & routing · Hydraulic hose specifications (YIS & special parts) · Air release of hydraulic equipment

Chapter 2 — Technical Data

Specifications (machine dimensions, traveling & working performance) · Outline drawings & working area (canopy and cabin types) · Weight list of main parts (front implement, undercarriage & upperstructure) · Lifting capacity list (blade on ground & blade above ground)

Chapter 3 — Service Standards

Machine performance (operating speeds, track speed, deviation & drift tolerances) · Engine service standards (cylinder head, valve clearances, pistons, camshaft & crankshaft) · Undercarriage standards — rubber track, steel track & common components · Controls (operating force, play & spool travel) · Hydraulic cylinder dimensions & piston nut torques · Implement standards (front attachments, blade, bucket teeth) · Tightening torque tables (machine, engine & general fasteners)

Ch. 4
Engine Overview
— Structural data, compression troubleshooting, maintenance schedule & 4TNV88 rebuild standards

Ch. 5
Hydraulic System
— Circuit schematics, control valve operation & system relief valve pressure adjustments

Ch. 6
Hydraulic Equipment
— Pumps, pilot valves, swing motors, travel motors & auxiliary solenoid valves

Ch. 7
Adjustment & Repair
— Electrical schematics, undercarriage rebuilds, swing bearing, hydraulic cylinder overhauls & cabin fittings

Ch. 8
Periodic Inspection & Servicing
— Lubrication schedules & preventative maintenance charts

Ch. 9
Fuel, Lube Oil & Grease
— Fluid specifications, viscosities & lubrication capacities

Ch. 10
Troubleshooting
— Systematic fault diagnostics for mechanical, hydraulic & electrical anomalies

Ch. 11
Reference Data
— Attachment specifications & auxiliary dimensional data

Key Technical Specifications

Yanmar 4TNV88 Engine

Configuration	4-cylinder, 4-cycle, water-cooled direct injection
Rated Output	38.7 HP (28.8 kW) at 2400 RPM
Displacement	133.5 cu.in. (2189 cc)
Compression Pressure	497.7 PSI (3.4 MPa at 250 RPM)
Valve Clearances (cold)	0.0059–0.0098 in. (0.15–0.25 mm) intake & exhaust
Fuel Injection Pressure	2844–2986 PSI (19.6–20.6 MPa)

Hydraulic System

Pump Type	Variable displacement (2 piston + 2 gear pumps)
Main Relief — ViO45-5	3128 PSI (21.6 MPa) allowable
Main Relief — ViO55-5	3555 PSI (24.5 MPa) allowable
Circuit Relief — ViO45-5	3555 PSI (24.5 MPa) — boom, arm & bucket
Circuit Relief — ViO55-5	3982 PSI (27.5 MPa) — boom, arm & bucket

Travel & Critical Torques

Travel Speed (low)	1.4 MPH (2.3 km/h)
Travel Speed (high)	2.7–2.9 MPH (4.4–4.6 km/h)
Cylinder Head Bolts	62.9–67.3 ft·lbf (85.3–91.1 N·m)
Connecting Rod Bolts	32.6–36.2 ft·lbf (44.1–49.0 N·m)
Swing Bearing Bolts	195.3–224.2 ft·lbf
Counterweight Bolts	354.4–441.3 ft·lbf

Why Use the Official Factory Manual?

Applying exact torque values, cylinder bleed protocols, and hydraulic relief pressure adjustments from this factory-issued publication eliminates guesswork, protects high-pressure hydraulic components from premature failure or cavitation, and maintains optimal digging performance. This manual covers both canopy and cabin machine variants across all serial number ranges.

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PDF download available immediately after checkout. Compatible with desktop, laptop, tablet, and smartphone. Print specific pages or zoom into technical drawings as needed.

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Yanmar ViO45-5, ViO45-5B, ViO55-5, ViO55-5B Excavator Service Manual

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Yanmar ViO45-5 & ViO55-5 Series Excavators

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