Description
Hymac 370C Workshop Manual covering electrical systems, hydraulics, fault finding, excavator and loader attachments, linkage assemblies and hydraulic ram servicing.
This 64-page digital PDF workshop manual provides detailed service and repair information for the Hymac 370C machine.
The Hymac 370C Workshop Manual is a practical technical reference for owners, engineers, workshops and restorers carrying out servicing, fault diagnosis and mechanical or hydraulic repairs.
The manual contains detailed factory-style technical information supported by diagrams, circuit drawings, component illustrations, test procedures and fault-finding charts.
Electrical system coverage includes:
• 12-volt electrical system
• Electrical circuit description
• Starting system
• Charging system
• Instruments and gauges
• Headlights
• Indicators
• Side and tail lights
• Working lights
• Windscreen wipers
• Heater
• Horn
• Interior lighting
• Wiring colour identification
• Electrical fault finding
• Battery maintenance
• Starter motor
• Dynamo
• Voltage regulator
A detailed electrical wiring diagram is included showing the main electrical circuits and connections throughout the machine.
The starting system section covers the starter motor, battery, ignition switch and voltage regulator together with testing and fault diagnosis procedures.
Charging system information includes dynamo operation, voltage regulation, servicing and basic fault finding.
The manual also covers the machine service circuits including oil pressure, engine temperature and fuel level instrumentation.
Lighting circuits include headlights, indicators, side lights, tail lights, working lights and interior lighting, with circuit diagrams and fault-finding guidance.
A major section of the Hymac 370C Workshop Manual is devoted to the hydraulic system.
The hydraulic system information includes:
• Hydraulic circuit layout
• Hydraulic pumps
• Main relief valves
• Valve blocks
• Excavator circuits
• Loader circuits
• Slew circuit
• Stabiliser circuit
• Swing lock circuit
• High pressure carry-over
• Cross-line relief valves
• Service line relief valves
• Anti-cavitation valves
• Pressure testing
• Pressure adjustment
• Pump testing
• Hydraulic fault finding
The hydraulic circuit diagram shows the relationship between the pumps, valve blocks, loader lift, loader bucket, excavator boom, dipper arm, bucket, slew and stabiliser systems.
Detailed procedures explain how to check and adjust system pressures using suitable pressure gauges and test equipment.
The manual includes pressure setting information for the main relief valves, service line relief valves and steering system.
Fault-finding charts provide a logical method of diagnosing hydraulic problems.
These include faults such as:
• Excavator boom lacks power when digging
• Excavator boom lacks power when lifting
• Dipper arm lacks power when digging
• Dipper arm lacks power when lifting
• Excavator bucket lacks power
• Slew lacks power
• Loader boom lacks power
• Loader bucket lacks power
• Stabilisers lack power
The fault-finding charts guide the engineer through pressure checks, pump flow checks, ram seal checks, relief valve testing and hydraulic valve diagnosis.
These charts are particularly useful when a hydraulic fault could be caused by several different components.
The manual also contains detailed mechanical information for the excavator and loader attachments.
Excavator bucket and linkage coverage includes:
• Bucket removal
• Bucket replacement
• Bucket pivot pins
• Tipping links
• Tipping levers
• Ram removal
• Inspection of pins and bushes
• Lubrication points
• Reassembly procedures
The excavator dipper arm section covers removal, replacement, pivot pins, bushes, inspection and servicing.
The excavator boom section provides procedures for removing and refitting the boom, disconnecting hydraulic hoses, removing pivot pins and inspecting associated bushes.
Loader equipment coverage includes:
• Loader bucket
• Loader bucket linkage
• Loader arm
• Pivot pins
• Tipping links
• Hydraulic connections
• Removal and replacement procedures
• Inspection of pins and bushes
The hydraulic ram section provides useful servicing and overhaul information.
Rams covered include:
• Excavator bucket ram
• Excavator dipper arm ram
• Excavator boom ram
• Loader ram
• Stabiliser rams
• Steering ram
The manual explains ram dismantling, piston rod removal, gland removal, seal replacement, inspection and reassembly.
Illustrated procedures show the fitting of gland seals, O-rings, circlips, split rings, washers and piston sealing components.
This information is especially useful when rebuilding leaking or worn hydraulic cylinders.
The Hymac 370C Workshop Manual is particularly valuable for older machines where original service information may no longer be available with the excavator.
It provides the technical information needed to diagnose faults rather than replacing parts by guesswork.
The combination of electrical diagrams, hydraulic schematics, pressure settings, mechanical dismantling procedures and fault-finding charts makes this a useful workshop reference for maintaining and restoring a Hymac 370C.
Manual details:
Manufacturer: Hymac
Model: 370C
Machine type: Excavator / Loader
Manual type: Workshop Service Manual
Language: English
Pages: 64
Format: Digital PDF
The Hymac 370C Workshop Manual provides detailed repair and service information covering electrical systems, hydraulics, pressure testing, fault diagnosis, excavator attachments, loader equipment, linkage and hydraulic ram overhaul.
Your order includes a PDF instruction/download document. The complete manual is supplied digitally by Filemail, normally within approximately one hour.
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