■■■■■■■
HYDRAULJC PISTON
Unscrew end cap
53
and remove together with pin tail deflector
54
(remove stem catcher unit if fitted).
Grip spring compression tool* in a vice and compress spring
6,
applying the clamp screw ball end to cylinder end plug
8
or stem
catcher adaptor
52
depending on tool model.
Remove internal circlip
9
using the circlip pliers*.
Unscrew the compression tool and remove cylinder end plug
8
or stem catcher adaptor
52
then spring
6.
Unscrew jaw spreader housing assembly
19
with spanner* and special spanner assembly*, then withdraw hydraulic piston
5.
Remove
piston stop
17
and extrude wiper ring
18.
Extract head piston stop
3
and rod seal
2
using the circlip pliers*.
Remove piston seal
4
from hydraulic piston
5.
Clean all parts.
Inspect the piston diameters and the cylinder bore for wear and damage.
Insert the head piston rod seal entry guide* into the hydraulic bore.
With rod seal
2
on the rod seal installation tool* push the seal into its housing with the lip of the seal towards the back of the tool.
Replace head piston stop
3
inside bore.
Screw the nose bullet* onto the end of the piston rod.
Insert the piston seal entry guide* into the hydraulic bore.
Position piston seal
4
with lip towards the front of the tool onto the piston and insert the piston into the hydraulic bore. Remove
bullet*.
.
Fit piston stop
17
with new wiper ring
18.
Always screw on a new jaw spreader housing assembly
19
and tighten to achieve a
maximum gap of .335" between its rear face and the front face of the handle assembly
1
(as shown in illustration on page 18).
Discard old jaw spreader housing
19.
Complete assembly in reverse order of dismantling.
AIR PISTON/ INTENSIFIER ROD
With tool connected to air supply, depress the trigger and disconnect the air supply.
Remove double male connector
42,
washer
43
and silencer
20.
■
Using Allen key* remove screws
51,
ONE AT A TIME, and install the service screws*.The order of
removal and installation is important and must follow the sequence shown on diagram opposite.
.
Withdraw handle assembly
1
to full extent of service screws*.
■
Remove service screws*, withdraw handle sub-assembly
10
and piston assembly
35
from air cylinder.
•
Remove gasket
47.
•
Remove all eight screws
13
with Allen key* to free retaining plate
12.
Using seal extractor* withdraw seal housing assembly
11.
Clean all parts.
To replace '0' ring
50
use '0' ring assembling tool*.
Inspect intensifier rod
39
and buffers
37
and/or spacer
55.
If damaged replace by new items using
tommy bar* and kit spanner assembly for head piston*.
Lubricate bores with Moly Lithium grease EP 3753*.
Rebuild seal housing assembly
11
and insert into handle sub-assembly
10
with '0' rings
14.
Attach retaining plate
12
with screws
13
tightenned to a 3.39 Nm (30 lb/in) torque.
Insert intensifier rod
39
through the seal housing into the handle assembly.
Fit
new gasket
47.
If Kay locknut
38
is removed, it MUST be replaced by a new one.
Assemble handle to air cylinder and complete assembly in reverse order to dismantling.
* refers to items included in the Avdel service kit. For complete list see page 15.
16
16
* refers to items included in the Avdel service kit. For complete list see page 15.
HYDRAULIC PISTON
Unscrew end cap 53 and remove together with pin tail deflector 54 (remove stem catcher unit if fitted).
Grip spring compression tool* in a vice and compress spring 6, applying the clamp screw ball end to cylinder end plug 8 or stem
catcher adaptor 52 depending on tool model.
Remove internal circlip 9 using the circlip pliers*.
Unscrew the compression tool and remove cylinder end plug 8 or stem catcher adaptor 52 then spring 6.
Unscrew jaw spreader housing assembly 19 with spanner* and special spanner assembly*, then withdraw hydraulic piston 5.
Remove piston stop 17 and extrude wiper ring 18.
Extract head piston stop 3 and rod seal 2 using the circlip pliers*.
Remove piston seal 4 from hydraulic piston 5.
Clean all parts.
Inspect the piston diameters and the cylinder bore for wear and damage.
Insert the head piston rod seal entry guide* into the hydraulic bore.
With rod seal 2 on the rod seal installation tool* push the seal into its housing with the lip of the seal towards the back of the tool.
Replace head piston stop 3inside bore.
Screw the nose bullet* onto the end of the piston rod.
Insert the piston seal entry guide* into the hydraulic bore.
Position piston seal 4 with lip towards the front of the tool onto the piston and insert the piston into the hydraulic bore. Remove
bullet*.
Fit piston stop 17 with new wiper ring 18. Always screw on a new jaw spreader housing assembly 19 and tighten to achieve a
maximum gap of .335” between its rear face and the front face of the handle assembly 1 (as shown in illustration on page 18).
Discard old jaw spreader housing 19.
Complete assembly in reverse order of dismantling.
AIR PISTON/INTENSIFIER ROD
With tool connected to air supply, depress the trigger and disconnect the air supply.
Remove double male connector 42, washer 43 and silencer 20.
Using Allen key* remove screws 51, ONE AT A TIME, and install the service screws*.The order of
removal and installation is important and must follow the sequence shown on diagram opposite.
Withdraw handle assembly 1 to full extent of service screws*.
Remove service screws*, withdraw handle sub-assembly 10 and piston assembly 35 from air cylinder.
Remove gasket 47.
Remove all eight screws 13 with Allen key* to free retaining plate 12.
Using seal extractor* withdraw seal housing assembly 11.
Clean all parts.
To replace ‘O’ ring 50 use ‘O’ ring assembling tool*.
Inspect intensifier rod 39 and buffers 37 and/or spacer 55. If damaged replace by new items using
tommy bar* and kit spanner assembly for head piston*.
Lubricate bores with Moly Lithium grease EP 3753*.
Rebuild seal housing assembly 11 and insert into handle sub-assembly 10 with ‘O’ rings 14.
Attach retaining plate 12 with screws 13 tightenned to a 3.39 Nm (30 lb/in) torque.
Insert intensifier rod 39 through the seal housing into the handle assembly.
Fit new gasket 47.
If Kay locknut 38 is removed, it MUST be replaced by a new one.
Assemble handle to air cylinder and complete assembly in reverse order to dismantling.