1970-1982 JCB 2D / 2DS / 3 / 3C / 3CS / 3D / 700 Workshop Service Manual
Technical reference spanning excavator loader models MK 2 & MK 3. Includes manual transmission and torque converter configurations with complete specifications and service procedures.
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Sample pages from the 1970-1982 JCB 2D / 2DS / 3 / 3C / 3CS / 3D / 700 Workshop Service Manual manual
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JCB Models Covered & Key Technical Specifications
Models: JCB 2D, 2DS, 3, 3C, 3CS, 3D, 700
Sub-models / Variants: MK 2 Range, MK 3 Range, Manual Gearbox variants, Torque Converter variants
Build Years: 1970–1982
Serial Numbers: 55000–68150 (MK2), 100001–124999 (Loaders), 125001–199999 (MK3)
Technical Data:
- Engine: BLMC 38TD four-cylinder diesel
- Engine displacement: 3.77 liters (230 cu in)
- Engine speeds: 700–720 rev/min idling; 2000 rev/min maximum
- Main hydraulic relief pressure: 138 bar (141 kgf/cm²; 2000 lbf/in²)
- Electrical system: 12 volt negative earth
- Torque converter oil temperature: 90–100°C normal; 120°C intermittent
- Transmission gear ratios: 10 Forward / 2 Reverse or 9 Forward / 3 Reverse
JCB Manual Features & Content Preview
JCB 2D, 2DS, 3, 3C, 3CS, 3D, and 700 Workshop Manual
- Covers the 1970–1982 JCB 2D, 2DS, 3, 3C, 3CS, 3D, and 700 excavator loader series, documenting MK 2 and MK 3 range configurations
- Official JCB service publication, original workshop-reference manual
- Contains 472 pages of technical data, exploded-view diagrams, and maintenance schedules for mechanical and hydraulic systems
- Delivered as a direct download the moment payment clears
- Indexed PDF search covers every chapter and appendix
- Stored against your account so you can retrieve it after a hard-drive loss
- This 1970–1982 JCB service publication provides the definitive reference for hydraulic, powertrain, and electrical systems in the MK 2 and MK 3 excavator range
Technical Scope and Maintenance Documentation
The 1970–1982 JCB 2D through 700 service manual provides technical data for the MK 2 and MK 3 range of machines. This publication documents routine maintenance schedules for the engine, cooling system, gearbox, and hydraulic assemblies, alongside comprehensive identification data for serial number tracking.
Additional sections detail the dismantling and assembly of specific excavator components such as the hydraulic pumps, control valves, and dipper attachments. The manual includes specific guidance on safety protocols when working with heavy lifting equipment, suction strainers, and pressurized hydraulic lines.
Specification Highlights
Engine cooling system capacity for the 38TD diesel configuration is documented at 13.6 liters. Main hydraulic relief valve pressure for these JCB machines is specified at 138 bar in the data table. The JCB 3D hydraulic system capacity is listed at 205 liters in the capacity technical reference charts.
Torque converter oil operating temperatures are documented at 90–100°C for normal service conditions. The manual details tightening specifications for various UNF Grade S and Metric 8.8 bolts used across the excavator structure. Reference only — always consult a certified technician before performing service on this equipment.
This 472-page JCB workshop manual covers the 1970–1982 JCB 2D, 2DS, 3, 3C, 3CS, 3D, and 700 excavators, documenting full mechanical, hydraulic, and electrical specifications for both MK 2 and MK 3 machine variants.
Document Reference: Original JCB service publication, 472 pages, copyright/internal reference context
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