6
-
6
42hw-201601
Chapter 6 hydrauliC system
3015r(h)/3515r(h)/4015r(h)/F36r(h)/F42r(h) traCtOr
hst mOdel
2
5
6
11
9
7
8
10
1
12
3
13
4
.BJOMJOF 1VNQ
4UFFSJOHMJOF 1VNQ
4VDUJPOMJOF
a42W603B
(1) PST cylinder
(2) Hydraulic pump (7cc)
(3) Hydraulic pump (13cc)
(4) PST valve
(5) Front outlet valve
(6) Hydraulic filter
(7) PTO valve
(8) Rear relief valve
(9) Hydraulic cylinder case
(10) Control valve
(11) HST filter
(12) Oil cooler
(13) HST
For the HST model, the hydraulic circulation circuit of the primary gear pump (13 cc/rev.) is the same to the
one for the mechanical model. However, these two models have different methods for hydraulic pressure
delivery of the secondary gear pump (7.0 cc/rev.).
Hydraulic oil supplied from the secondary gear pump is used to operate the PST valve and PTO valve. Then,
it is carried from the PTO valve into the HST filter to be filtered. After filtered, it is led into the oil cooler to be
cooled down to a sufficient level before it is delivered to the HST for HST operation.
Summary of Contents for 3015h
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