Specifications

I & M BULLETIN
HPTO8TD-100
HYDRAULIC POWER TAKE-OFF
Page 4 of 4
SERVICE INSTRUCTIONS
The HPTO can be reconditioned in the field
or sent back to PT Tech. Contact PT Tech
if any portions of these service instructions
are unclear.
DISASSEMBLY INSTRUCTIONS
Refer to exploded view drawing
HPTO10TD-100 sheet 2 of 2.
1. Carefully remove all wiring and
hydraulic hose connections to the
manifold. ATTENTION: Leave
manifold mounted to the HPTO at
this time.
2. Remove speed pickup sensor (Item
4).
3. Remove sheave and QD bushing from
the shaft.
4. Use lifting device to support HPTO
then remove all housing bolts (Item
33).
5. The HPTO can now be removed from
the engine and placed on a suitable
working surface.
6. Remove o-ring plug (Item 30) from
shaft end. Important: keep area
around the o-ring plug clean and free
from debris.
7. Loosen bolt on clamp nut (Item 35)
and remove clamp nut off of shaft.
8. Remove piston (Item 9) from shaft.
Note: Install qty. of 3, 3/8-16 threaded
bolts into holes in piston to assist in
piston removal.
Note: backplate (Item 14) will come off
with the piston.
9. Remove all seals from piston, shaft
and backplate (Items 10, 18 & 19).
10. Remove quantity of three springs
(Item 41).
11. Remove two friction plates (Item 6)
and seperator plate (Item 7)
12. Remove endplate (Item 3) by utilizing
the ½-13 threaded holes in the
endplate and ½-13 threaded hole in
the end of the shaft.
ATTENTION: The endplate is a
press fit and will require a fixture to
remove the endplate from the shaft.
13. Remove key (Item 36).
14. Remove seal (Item 28)
15. Remove retaining ring (Item 22).
16. Remove seal cover (Item 17)
17. Push shaft (small end) 1” axially
toward the endcover (Item 2). The
I.D. of bearing (Item 27) will then be
loose. Remove cylindrical bearing
(Item 27).
18. Press shaft (Item 8) out of endcover
(Item 2) by pushing the shaft (small
end) axially towards the endcover.
19. Remove qty. of 2, hook ring piston
seals (Item 5) from shaft.
20. Remove retaining ring (Item 26)
spherical roller bearing (Item 13).
21. Remove two retaining rings (Item 24 &
25 ).