Cat Caterpillar D3G D4G D5G Hystat Track Type Tractor HYD Factory Service Repair Manual

Price range: $42.00 through $51.00

Cat Caterpillar D3G D4G D5G Hystat Track Type Tractor HYD Factory Service Repair Manual

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Loaded with Hi Resolution illustrations, instructions, photos, and diagrams, complete to service and repair your CAT.

15744 Pages

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SKU: N/A Categories: Heavy Machinery, CAT Caterpillar

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Cat Caterpillar D3G D4G D5G Hystat Track Type Tractor HYD Factory Service Repair Manual

Loaded with illustrations, instructions, photos, and diagrams, complete to service and repair your CAT.

” Works on any computer, laptop, smartphone, iPad, iPhone, or tablet. “

15744 Pages

We have a large selection of service manuals for other CAT CATERPILLAR models. Please send us your machine’s serial number (S/N) or AR number or your model type.

MANUAL COVERS:

Disassembly and Assembly (1873 Pages)

Operation and Maintenance (2525 Pages)

Schematics (51 Pages)

Specifications (1003 Pages)

System Operation (3634 Pages)

Testing and Adjusting (4132 Pages)

Troubleshooting (2556 Pages)

Wiring Diagram (51 Pages)

This manual is the same as the manual used by workshops. Service Manual contains detailed instructions and step by step diagrams for all workshop procedures.

Language: English
Format: PDF – Indexed

COMPATIBLE WITH ALL WINDOWS & MAC COMPUTERS
(WINDOWS 10, WINDOWS 8, WINDOWS 11, ETC.)

Windows/Mac/Tablet/Phone Friendly

Factory Service Manual

Our manual provides the highest-quality OEM repair information available. Unlike common aftermarket repair manuals such as AllData, Haynes, Chilton, and others, this is the same factory service information used by dealership technicians.

Features & Benefits

Factory Information – Accurate repair procedures, specifications, service information tailored to your vehicle.
Permanent Ownership – No subscriptions, recurring fees, or expiration dates. Buy it once and keep it forever.
No Software Required – Works with any standard PDF reader on Windows, Mac, smartphones, and tablets.
Flexible Storage Options – Save your manual to a USB drive, CD, DVD, cloud storage, Dropbox, computer, or mobile device.
Print-Friendly Format – Print the entire manual or only the pages needed for a specific repair.
Portable & Convenient – Compact PDF files make storage and access simple from virtually any device.

Get dealership-level repair information with the convenience of a PDF manual designed specifically for your vehicle.

The Caterpillar D3G, D4G, and D5G Hystat Track-Type Tractors feature a fully hydraulic, closed-loop hydrostatic drive system (HYD) that powers both machine travel and implement operations. Unlike mechanical transmissions, the Hystat system utilizes variable-displacement pumps and dual-path hydraulic motors to deliver independent power to each track for seamless, counter-rotating turns.

Hydrostatic System Specifications

The core Hystat drive and implement hydraulic metrics across these G-Series models include:

Drive System: Closed-loop, dual-path hydrostatic drive
Travel Pumps: Dual variable-displacement axial piston pumps
Track Motors: Two dual-displacement link-type piston motors
Implement Pump: Fixed-displacement gear pump (powers blade lift, tilt, and angle)
System Relief Pressure: 41,300 kPa (6,000 psi) for travel circuits
Implement Relief Pressure: 20,600 kPa (3,000 psi) for standard blade controls
Hydraulic Tank Capacity: Approximately 48 L (12.7 gal) for system refill

Model Engine & Power Profile

All three crawler models utilize the same hydraulic platform architecture, but scale up in engine displacement, physical weight, and track shoe footprints:

Cat D3G: Powered by a Cat 3046T engine delivering 52 kW (70 hp) with an operating weight of roughly 7,200 kg (15,800 lb).
Cat D4G: Powered by a Cat 3046T engine delivering 59.7 kW (80 hp) with an operating weight of roughly 7,600 kg (16,800 lb).
Cat D5G: Powered by a Cat 3046T engine delivering 67 kW (90 hp) with an operating weight of roughly 8,900 kg (19,600 lb).

Hydraulic Troubleshooting & Schema Resources

When diagnosing a loss of travel power, slow tracking, or blade drift, mechanics rely on specific factory schematic booklets:

Hydraulic System Schematic (Form SENR9519): Contains full fluid flow maps, diagnostic pressure-tap locations, and electronic-over-hydraulic valve block layouts for D3G/D4G/D5G models.
Hystat Diagnostic Testing & Adjusting: Instructs technicians on how to hook up pressure gauges to the test ports on top of the transmission pumps to check charge pressure (2,800 kPa / 400 psi nominal) and high-pressure relief limits.
Component Purchasing: Exact factory reference manuals and diagnostic guides can be found using the Caterpillar Service Information System (SIS) or via digital manual archives on EPCatalogs Service Publications.