Table of Contents
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Caution: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless
otherwise noted.
Description and Operation ................................. 1F3-2
Fuel System ...................................................... 1F3-2
Governor ........................................................... 1F3-4
Pneumatic Idle Speed Increase (PLA) ............... 1F3-11
Pneumatic Shut-Off Device (PNAB) ................... 1F3-12
Exhaust Gas Recirculation (EGR) Valve .............1F3-13
Component Locator ......................................... 1F3-15
Fuel Injection Pump .......................................... 1F3-15
Vacuum Pump (Sectional View) .........................1F3-16
Diagnostic Information And Procedure ........... 1F3-17
Vacuum Control System Test ............................ 1F3-17
Vacuum Shut-Off Leak Test ............................... 1F3-21
Idle Speed Adjustment .....................................1F3-23
Fuel Pump Test ................................................. 1F3-25
Injection Nozzle Test ........................................1F3-28
Checking and Adjusting Start Of Delivery .......... 1F3-31
SECTION 1F3
DIESEL ENGINE CONTROLS
TABLE OF CONTENTS
Repair Instructions ............................................ 1F3-41
On-Vehicle Service ........................................... 1F3-41
Vacuum Pump .................................................. 1F3-41
Vacuum Unit Replacement ................................ 1F3-43
Fuel Pump ........................................................ 1F3-44
Injection Nozzles ..............................................1F3-46
Injection Nozzle Repair .....................................1F3-48
Injection Timing Device Assembly .................... 1F3-51
Injection Timing Device .....................................1F3-56
Fuel Injection Pump .......................................... 1F3-58
Fuel Tank .......................................................... 1F3-64
Specifications ................................................... 1F3-66
General Specifications ......................................1F3-66
Fastener Tightening Specifications .................... 1F3-67
Schematic and Routing Diagrams ................... 1F3-68
EGR System................................................... 1F3-68
Special Tools and Equipment .......................... 1F3-69
Special Tools Table ...........................................1F3-69
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