Cub Cadet 310-3000 - Manual (Page 4)

ii 310-3000 IHT
INTRODUCTION
The purpose of this manual is to provide use-
ful information for servicing the Hydro-Gear
®
310-3000 Integrated Hy dro stat ic Transaxles
(IHT). This man u al includes transaxle gen-
eral de scrip tion, hy drau lic sche mat ic, tech ni cal
spec i fi ca tions, product iden ti fi ca tion, safe ty,
trou ble shoot ing, main te nance, and re pair pro-
ce dures.
The transaxle normally will not require servic-
ing during the life of the vehicle in which it is
in stalled. Should other ser vic ing be required,
the transaxle will need to be thoroughly cleaned
be fore be gin ning most procedures.
Please refer to the instructions titled “How to
Use This Man u al” in the Repair Section for an
ex pla na tion of the lay out of the disassembly,
in spec tion, and re as sem bly portions of this
manual.
GENERAL DESCRIPTION
The 310-3000 is a self con tained unit de signed
for the transfer and con trol of pow er. It provides
an in fi nite ly vari able speed range be tween zero
and maximum in both forward and re verse
modes of operation.
The transaxle uses a variable displacement
pump with a max i mum displacement of 10
cc per rev o lu tion, and motor with a fi xed dis-
place ment of 21cc per rev o lu tion. The vari able
dis place ment pump fea tures a cradle swash-
plate with a di rect-pro por tion al displacement
con trol. Re vers ing the di rec tion of the swash-
plate re vers es the fl ow of oil from the pump
and thus re vers es the di rec tion of the motor
output ro ta tion. The pump and motor are of the
axial piston de sign and utilize spherical nosed
pistons which are held against a thrust race by
internal com pres sion springs.
The 310-3000 has a self con tained fl u id sup ply
and an in ter nal fi l ter. The fl uid is drawn through
the in ter nal res er voir and feeds the fi xed dis-
place ment gerotor charge pump. Ex cess fl u id in
the charge circuit is dis charged over the charge
re lief valve and dumps back to case. Charge
check valves in the center section are used to
control the make up fl ow of the fl uid to the low
pres sure side of the loop.
The transaxle is fi lled and tested at the factory
and should not re quire fl uid or fi lter changes
un less the fl uid be comes con tam i nat ed.
A cam style, block lifting bypass is utilized in
the 310-3000 to permit moving the vehicle for a
short dis tance at a maximum speed of 2 m.p.h.
(3.2 km/hr) with out start ing the engine.
WARNING
Actuating the bypass will result in the
loss of hy dro stat ic braking capacity. The
machine must be sta tion ary on a level
surface and in neutral when actuating
the bypass.
The 310-3000 utilizes an in-line fl oat ing disc
brake con trolled by a "cam" style ac tu at ing
arm.
SECTION 1. DESCRIPTION AND OPERATION