General Information 1
Care & Safety 2
Routine Maintenance 3
Attachments A
Service Body & Framework B
Manual Electrics C
3CX, 4CX,
214e,214, 215,217
Controls D
& VARIANTS
Backhoe
Hydraulics E
Loader Transmission F
From M/c No. 930000 Onwards
From M/c No. 903000 Onwards (USA) Brakes G
PUBLISHED BY THE
Steering H
TECHNICAL PUBLICATIONS DEPARTMENT
OF JOB SERVICE; © WORLD PARTS CENTRE,
WATERLOO PARK, UTTOXETER, ST14 5PA
ENGLAND
Tel. ROCESTER (01889) 590312
Engine K
PRINTED IN ENGLAND
Servo Controls
Publication No. 9803/3280 Issue 9
(Precision Controls) L
,Introduction
This publication is designed for the benefit of JCB Distributor Service Engineers who are receiving, or have received, training
by JCB Technical Training Department.
These personnel should have a sound knowledge of workshop practice, safety procedures, and general techniques
associated with the maintenance and repair of hydraulic earthmoving equipment.
Renewal of oil seals, gaskets, etc., and any component showing obvious signs of wear or damage is expected as a matter of
course. It is expected that components will be cleaned and lubricated where appropriate, and that any opened hose or pipe
connections will be blanked to prevent excessive loss of hydraulic fluid and ingress of dirt. Finally, please remember above all
else SAFETY MUST COME FIRST!
The manual is compiled in sections, the first three are numbered and contain information as follows:
1 = General Information - includes torque settings and service tools.
2 = Care & Safety - includes warnings and cautions pertinent to aspects of workshop procedures etc.
3 = Routine Maintenance - includes service schedules and recommended lubricants for all the
machine.
The remaining sections are alphabetically coded and deal with Dismantling, Overhaul etc. of specific components, for
example:
A = Attachments
B = Body & Framework ...etc.
The page numbering in each alphabetically coded section is not continuous. This allows for the insertion of new items in later
issues of the manual.
Section contents, technical data, circuit descriptions, operation descriptions etc are inserted at the beginning of each
alphabetically coded section.
All sections are listed on the front cover; tabbed divider cards align directly with individual sections on the front cover for rapid
reference.
Where a torque setting is given as a single figure it may be varied by plus or minus 3%. Torque figures indicated are for dry
threads, hence for lubricated threads may be reduced by one third.
With the exception of slewing operations 'Left Hand' and 'Right Hand' are as viewed from the rear of the machine facing
forwards.
Machine Nomenclature
In this Service Manual, reference is made to machine models, e.g. 3CX, 4CX, these are European machine model names.
North American machine models have different names, the table below shows the European and the equivalent North
American nomenclature.
European North American
3CX = 214
4CX = 214S, 215S, 217S
9803/3280 Issue 1
,Colour Coding
The following colour coding, used on illustrations to denote various conditions of oil pressure and flow, is standardised
throughout JCB Service publications.
Red — Full Pressure
Pressure generated from operation of a service. Depending on application this may
be anything between neutral circuit pressure and M.R.V. operating pressure.
Pink — Pressure
Pressure that is above neutral circuit pressure but lower than that denoted by red.
Orange — Servo
Oil pressure used in controlling a device (servo).
Blue — Neutral
Neutral circuit pressure.
Green — Exhaust
Light — Cavitation
Green Oil subjected to a partial vacuum due to a drop in pressure (cavitation).
Yellow — Lock Up
Oil trapped within a chamber or line, preventing movement of components (lock up).
A390940
9803/3280 Issue 1
,
Care & Safety 2
Routine Maintenance 3
Attachments A
Service Body & Framework B
Manual Electrics C
3CX, 4CX,
214e,214, 215,217
Controls D
& VARIANTS
Backhoe
Hydraulics E
Loader Transmission F
From M/c No. 930000 Onwards
From M/c No. 903000 Onwards (USA) Brakes G
PUBLISHED BY THE
Steering H
TECHNICAL PUBLICATIONS DEPARTMENT
OF JOB SERVICE; © WORLD PARTS CENTRE,
WATERLOO PARK, UTTOXETER, ST14 5PA
ENGLAND
Tel. ROCESTER (01889) 590312
Engine K
PRINTED IN ENGLAND
Servo Controls
Publication No. 9803/3280 Issue 9
(Precision Controls) L
,Introduction
This publication is designed for the benefit of JCB Distributor Service Engineers who are receiving, or have received, training
by JCB Technical Training Department.
These personnel should have a sound knowledge of workshop practice, safety procedures, and general techniques
associated with the maintenance and repair of hydraulic earthmoving equipment.
Renewal of oil seals, gaskets, etc., and any component showing obvious signs of wear or damage is expected as a matter of
course. It is expected that components will be cleaned and lubricated where appropriate, and that any opened hose or pipe
connections will be blanked to prevent excessive loss of hydraulic fluid and ingress of dirt. Finally, please remember above all
else SAFETY MUST COME FIRST!
The manual is compiled in sections, the first three are numbered and contain information as follows:
1 = General Information - includes torque settings and service tools.
2 = Care & Safety - includes warnings and cautions pertinent to aspects of workshop procedures etc.
3 = Routine Maintenance - includes service schedules and recommended lubricants for all the
machine.
The remaining sections are alphabetically coded and deal with Dismantling, Overhaul etc. of specific components, for
example:
A = Attachments
B = Body & Framework ...etc.
The page numbering in each alphabetically coded section is not continuous. This allows for the insertion of new items in later
issues of the manual.
Section contents, technical data, circuit descriptions, operation descriptions etc are inserted at the beginning of each
alphabetically coded section.
All sections are listed on the front cover; tabbed divider cards align directly with individual sections on the front cover for rapid
reference.
Where a torque setting is given as a single figure it may be varied by plus or minus 3%. Torque figures indicated are for dry
threads, hence for lubricated threads may be reduced by one third.
With the exception of slewing operations 'Left Hand' and 'Right Hand' are as viewed from the rear of the machine facing
forwards.
Machine Nomenclature
In this Service Manual, reference is made to machine models, e.g. 3CX, 4CX, these are European machine model names.
North American machine models have different names, the table below shows the European and the equivalent North
American nomenclature.
European North American
3CX = 214
4CX = 214S, 215S, 217S
9803/3280 Issue 1
,Colour Coding
The following colour coding, used on illustrations to denote various conditions of oil pressure and flow, is standardised
throughout JCB Service publications.
Red — Full Pressure
Pressure generated from operation of a service. Depending on application this may
be anything between neutral circuit pressure and M.R.V. operating pressure.
Pink — Pressure
Pressure that is above neutral circuit pressure but lower than that denoted by red.
Orange — Servo
Oil pressure used in controlling a device (servo).
Blue — Neutral
Neutral circuit pressure.
Green — Exhaust
Light — Cavitation
Green Oil subjected to a partial vacuum due to a drop in pressure (cavitation).
Yellow — Lock Up
Oil trapped within a chamber or line, preventing movement of components (lock up).
A390940
9803/3280 Issue 1
,
