Repair Instructions - Valtra 6000 Workshop Manual

46. Front PTO

Repair instructions:

Ref. numbers in the instructions refer to picture 24.
A. Changing v ---belts:
--- unscrew drive flange bolts (90 Nm) in front of the rubber
coupling 2
--- remove spacer ring 2a
--- remove v ---belts through the gab
B. Removing / fitting the PTO unit:
Removal:
--- unscrew drive flange bolts (90 Nm) in front of the rubber
coupling 2
--- disconnect oil cooler hoses
--- disconnect proportional valve wires.
--- drain oil (if necessary)
--- unscrew PTO unit fixing bolts.
Fitting:
--- fit the unit into place and guide the drive shaft and hoses
into places.
--- tighten four fixing bolts to 150 Nm
--- connect drive flange (90 Nm)
--- connect oil hoses.
--- connect eletric wires
--- fill the unit with oil (if drained)
C. Changing clutch discs / PTO shaft
--- detach the PTO unit. Drain oil.
--- disconnect the drive shaft tapered joint as follows:
Remove the breather flange on upper front face. Prevent shaft
from rotating and unscrew the joint bolt. Screw in a longer bolt
M22x1,5 and hit against the end of the bolt until the joint relea-
ses.
--- place the PTO unit , PTO shaft upwards, on a suitable gro-
und, unscrew housing halves bolts and split the housing.
--- take the PTO shaft/clutch out of the houisng.
--- compress the piston return springs with e.g. three small
glue clamps and remove the piston snap ring. Remove the
piston and the clutch disc pack
--- if the PTO shaft is changed, remove parts on the shaft (see
picture 24), change the shaft and refit the parts on the new
shaft.
--- change clutch discs and oil them. Fit the piston, compress
the springs and fit the snap ring.
--- position all parts into the housing
1. 8. 2000
To be observed during assembling:
--- before connecting the housing halves, check that the inter-
mediate shafts are in bottom and the tension pins in their bo-
rings
--- use new 0,4 mm paper gasket between housing halves
--- do not damage the PTO shaft oil seal when fitting the upper
housinhg half
--- tap the upper housing half until the contact surfaces are
against each others.
--- tighten progressively the housing halves bolts
--- Connect the drive shaft tapered joint as follows:
Clean well the tapered surfaces. Apply suitable Loctite locking
fluid on the tapered surface. Prevent the drive shaft from rota-
ting and tighten the M22 bolt to 550 Nm. Fit the breather flan-
ge in front of the bolt.
--- Fill the PTO with oil.
D. Changing outer oil seals
PTO shaft seal:
--- the seal can be changed from front without removing the
PTO unit. Pry out the damaged seal in a suitable way. Do not
damage the shaft sealing surface.
--- oil the lips of as new seal and fit it by using a suitable sleeve
or the old seal. Do not damage the new seal on the shaft spli-
nes
Drive shaft seal:
--- remove the front PTO unit.
--- remove the drive flange on the drive shaft front end and pry
out the seal. Do not damage the sealing surface
--- oil the lips of a new seal and fit it
--- refit the PTO unit
858
Model Code
6250Hi--
463
6850Hi
Page
13C