New Holland TD60D Repair Manual page 349

SECTION 35 − HYDRAULIC SYSTEM − CHAPTER 1
a. Detail of O−ring and arm lowering adjuster valve
anti−extrusion ring.
b. Detail of O−ring and control valve pin seat anti−
extrusion ring.
C Cylinder safety valve.
7
C Lift cylinder oil delivery union.
8
C Plug.
9
C Control valve to lift body retaining bolt.
10
1. Control valve block pin.
2. Control valve block pin seat.
3. Plug.
4. Spring positioning control valve pin in discharge
phase.
5. Pilot valve pin.
6. Spring positioning pin when lifting.
7. Pilot valve piston seat.
8. Pilot valve piston.
Note − Install the O−ring 20 and anti−extrusion ring 21 as illustrated in the drawing (a and b) using the protection
device 380000266 and heating the ring 21 in oil at 50 °C.
Take care to install ring 21 with the flat surface facing upwards and concave surface facing O−ring 20. Take ne-
cessary precautions not to damage them.
The mechanical lift can operate with controlled posi-
tion or draft control and with a combination of the two.
The lift is controlled by two levers located on the op-
erator's right. It also features the Lift−O−Matic device
which raises and lowers the implement without the
need to use the position and draft control levers.
Sectional drawing of hydraulic lift control valve block
DESCRIPTION AND OPERATION
9. Spring cup.
10. Intervention speed adjustment valve spring.
11. Intervention speed adjustment valve oil inlet ori-
fice.
12. Plug.
13. O−ring seal.
14. Lowering adjuster valve pin.
15. Arm descent speed control valve spring.
16. Arm descent adjustment valve spring loading
pin.
17. Locknut for arm descent adjustment valve spring
loading pin.
18. Check valve ball.
19. Check valve spring.
20. O−ring.
21. Anti−extrusion ring.
22. Plug.
Draft control is actuated by the flex bar positioned in
the special box mounted under the rear transmis-
sion.
The lower lift arms and corresponding control rods
are connected to the flex bar.
9
604.54.471.00 − 11 − 2004