John Deere 318 - Manual (Page 395)

Section 270
HYDRAULIC SYSTEM CHECKOUT,
OPERATION AND DIAGNOSIS
Contents
Page
Group 05—Hydraulic System Checkout
Before You Start . . . . . . . . . . . . . . . . . 270-05-1
Hydraulic System Oil Leak Check . . . . . . 270-05-1
Hydraulic Control Valve Check . . . . . . . . 270-05-2
Operator Complaint Not Identified . . . . . . 270-05-2
Group 10—Hydraulic Schematics
Hydraulic Circuit Symbols . . . . . . . . . . . 270-10-2
Hydraulic System Schematics
316 . . . . . . . . . . . . . . . . . . . . . . . . 270-10-5
Early 318 . . . . . . . . . . . . . . . . . . . . . 270-10-6
Later 318 . . . . . . . . . . . . . . . . . . . . . 270-10-9
Early 420 . . . . . . . . . . . . . . . . . . . . 270-10-10
Later 420 . . . . . . . . . . . . . . . . . . . . 270-10-13
Group 15—Theory of Operation
Hydraulic Lift System Operation
Three-Position Spool . . . . . . . . . . . . . 270-15-1
Four-Position Spool . . . . . . . . . . . . . . 270-15-2
Group 20—Diagnosis, Tests and Adjustments
About This Group . . . . . . . . . . . . . . . . 270-20-1
Troubleshooting Guide . . . . . . . . . . . . . 270-20-2
Hydraulic Oil Warm-Up Procedure . . . . . . 270-20-5
Rockshaft Cylinder Leakage Test . . . . . . 270-20-5
Control Valve Leakage Test . . . . . . . . . . 270-20-6
Bleed Hydraulic System . . . . . . . . . . . . 270-20-8
TM1590 (17MAY95)
270-1
316, 318 & 420 Lawn and Garden Tractors
020895
270