Doosan DA40 - Page 534

SHOP MANUAL
DRIVE LINE
Ch 3 page 170 Ch 3 page 171
DRIVE LINE
Finally check the rolling
resistance. 28 - 37 Nm
28 - 37 Nm
Prepare stand for the hub work over
Assemble the scoop ring.
Screw M6x20 ISO4062-8.8
Apply locking liquid: Tree Bond
1374
Tightening torque: 9,5 Nm
Be aware the scoop ring had to
be assembled at the correct hub.
Se figure below.
Prepare stand for the hub work over
Assemble the
wheel bolt.
Use hydraulic press or
sledgehammer.
Preassemble the distance ring
Insert 2 pcs. screws plug and O-ring
Lubricate the O-ring and use
locking compound (tread lock)
Tree Bond 5111to lock the
screw plug.
Clean the axle
and apply oil
Assemble the distance ring.
Check the ring is in contact
with the axle flange
NOTE:
Assemble the seal ring
Be aware dont bend the ring
 Handle with care, replace worn rings with new
 Dont mix the rings (Only as set)
 Clean the surfaces before assembly
Assemble the outer bearing.
Clean the axle and apply oil
before assemble the bearing.
Heat the bearing with
electrical heater or hot oil
Temp 75 - 90°C
(167 - 194°F)
Hold press to the bearing
until cool down
Turn the hub housing
180 ° while assembly
the bearing cup and
the seal
Clean the bearing surface and
assemble the bearing cup
Clean the surface and
assemble the seal ring
Place the hub in assembly rack after assemble
of the bearing cup and the seal ring.
Be careful with the seal ring
Insert the plug
Clean the bearing surface and
assemble the bearing cup
Assemble the guide ring
Pos 23-24
Assemble the piston ring
Pos 21 - 22
Assemble the guide ring
Use glue: Loctite no.406
at both ends.
Lubricate seal area
before inserting the
piston.
Preassemble the Return mechanism- piston
X
1
2
3
4
5
Figure 26
Legend to the sketch:
1 = Pin
2 = Gripping rings
3 = Cup springs
4 = Support shim
5 = Circlip
X = Installation dimension Gripping rings 8.2 +0.3mm
For more details about assembling
of the return mechanism, see
description in the Shop Manual,
front axle, hub assembly.
Place the return mechanism lock ring
Assemble 6 pcs. of the slot pin
into the return mechanism
Slot pin 6x20 DIN 1481
Calculation example:
Measure A.................................. 47,10
Measure B.................................- 6,40
Gives:..........................................= 40,70
Discs unit.................................. - 38,60
Clearance.................................. = 2,10
Allowed clearanse 1,7 - 2,1 mm
B
A
Place the "line up tool"
Moxy part No. 514663
Apply oil to the parts and place the
brake disc, one by one.
Start assembly with outer disc.
1 The outer disc (5 pcs, differe
nt thickness available)
2 The inner disc (4 pcs. thickne
ss 4,7 mm)
4.0
4.0
4.0
4.0
3.8
E
xample
Clean the surface and
place the O-ring
P
lace the flange
2
0 pcs . screw M16x50 ISO4017-10.9 EL
A
pply locking liquid: Tree bond 1374
W
asher 17x30x3 NS-ISO 7089 300HV
T
ightening torque: 280 Nm.
0 bar
50 bar
Pressure test:
Increase test pressure up to p = 50 bar
and close the
connection to the HP-pump by means
the of shut-off valve.
During a 5 min. testing time a pressure
drop of max. 2 %
(1 bar) is allowed!
Shut of valve
Remove the tool
The press is stay on !
Lubricate the parts and
assemble the carrier.
Now, remove the
pressure tester,
connect lifting device
Lubrica
te sealring
surfaces.
Be aware and careful
of the seal ring on
lower end of the hub
while assembly the
hub to the axle.
Remove the
lifting device.
Prepare to assemble the roller bearing:
Clean the hub axle and bearing cup.
Apply lubricant.
Assemble the inner bearing.
Clean the axle and apply oil
before assemble the bearing.
Heat the bearing with
electrical heater or hot oil
Temp 75 - 90°C
(167 - 194°F)
1)
Assemble the gear wheel
to contact with the bearing
inner ring.
NOTE: Do not press !
2)
With no press rotate the axle
20 times.
1000
mm
Resistance :
8 - 17 Nm.
(3)
Check the rolling resistance.
Resistance : 8 - 17 Nm.
NOTE:
At this stage, no preload on the beari
ng
(Free spinning)
Place the end plate and with 2 screws
assembled, torque the screw until the
rolling moment now is +20 Nm
from previous check 28 - 37 Nm.
Measure the clearanse between end
plate and the axle end.
(Example 2,20 mm)
NOTE!
At this stage the screw for
connection the gear wheel
and the carrier not is
assembled
Locate the shims (example 2,2 mm)
0,5
0,5
0,5
0,5
0,1
0,1
Place the end plate , assemble screws.
Screw M16x50 ISO4017-10.9 EL
Apply locking liquid: Tree Bond 1374
Tightening torque 280 Nm
1000
mm
Resistance
:
28 - 37 Nm.
Finally check the rolling moment.
28 - 37 Nm
Assemble the scoop ring.
Screw M6x20 ISO4162-8.8
Apply locking liquid: Tree Bond 1374
Thigetening torque: 9,5 Nm
NOTE
Be aware the scoop ring
had to be assembled at the
correct hub.
Se the figure at left
LHS
RHS
Rolling direction when machine is driving forward
Thigetening torque: 9,5 Nm
Only for machines to the serial number -->8X0510
NOTE
Figure 509
Figure 508
Figure 511
Figure 510