AGCO ST35X and ST40X Compact Tractor Service Manual

Book Number: 79021727
English
AGCO ST35X, ST40X Compact Tractor Manual
Manual for: AGCO Tractor

Manual TABLE OF CONTENTS

INTRODUCTION …………………………………………………………………………………. 01
SHEET METAL AND 3-POINT HITCH ………………………………………………….. 01A
MAJOR COMPONENTS ……………………………………………………………………….. 01B
ENGINE SERVICE MANUAL …………………………………………………………………02A
FUEL SYSTEM, COOLING SYSTEM AND AIR CLEANER ………………………. 03A
CLUTCH …………………………………………………………………………………………….. 04A
TRANSMISSION …………………………………………………………………………………..05A
FRONT AXLE (4WD) …………………………………………………………………………….06A
REAR AXLE AND BRAKES ……………………………………………………………………07A
HYDROSTATIC STEERING …………………………………………………………………. 08A
HYDRAULIC SYSTEM …………………………………………………………………………..09A
ELECTRICAL SYSTEM ………………………………………………………………………… 10A
ST35X, ST40X Manual Extract
INPUT GEARS
Construction
The input gears consist of a PTO clutch assembly, reverse idler, idler and forward/reverse shuttle assembly.
Forward/reverse shuttling is done with a synchronizer.
Seperate the front transmission at the spacer transmission as outlined in Section 1B to access the input gears.
PTO Clutch

The PTO on is driven thru a wet multi-disced, hydraulically operated clutch pack. For the PTO to work, the mechanical PTO lever located at the rear of the tractor must be engaged and the on/off switch on the console must be in the “ON” position. When the switch is in the “ON” position, the PTO valve is energized allowing oil pressure to clamp the discs in the PTO clutch pack together and turn the PTO shaft.

Oil Supply to Clutch Packs

Oil is transfered from the auxillary (steering) hydraulic pump to a reducing valve. The reducing valve acts as a flow divider, dividing the flow of oil to a primary and secondary circuit. Oil for the PTO clutch pack is supplied by the secondary circuit of the reducing valve. The reducing valve maintains line pressure to the secondary circuit to operate the PTO clutch pack.