6-58
1. MAIN PUMP
STRUCTURE(1/2)
1)
35
1
27
16 21 17
21 20
22
39
34
26
19
P2 CARTRIDGE
P1 CARTRIDGE
1
End cap
2 Bushing
16
Internal snap ring
17 Ball bearing
19 Splined shaft
20 Shaft seal
21
Internal snap ring
22 Mounting cap
26 Section seal
27 Center housing
34 Section seal
35 Cap screw
39 Cap screw
GROUP 4 DISASSEMBLY AND ASSEMBLY
7807WE28
6-59
STRUCTURE(2/2)
8
3
4
5
2
30
6
7
36
29
31
32
33
15
14
13
23
24
11
12
25
10
11
9
28
37
P2 CARTRIDGE
P1 CARTRIDGE
2
Section seal
3
Section seal
4
Back up ring
5
Pressure port plate
6 Camring
7 Rear port plate
8
Bush bearing
9 Rear port plate
10 Camring
11 Dowel pin
12 Vane holdout pin
13 Back up ring
14 Section seal
15 Section seal
23 Pressure port plate
24 Rotor assembly
25 Vane
28 Lock pin
29 Lock pin
30 Rotor assembly
31 Vane holdout pin
32 Vane
33 Dowel pin
36 Screw
37 Screw
7807AWE29
6-60
GENERAL INSTRUCTION
Preliminary
Any servicing work done on main pump is to be done in a clean environment to prevent potential
contamination by foreign particles.
Appropriate tools and equipment are required in order to insure proper disassembly and
reassembly in suitable conditions. In case of repetitive service, a specific working bench is
recommended.
To prevent oil leakage and body tilting during assembly, housing bolts are to be tightened as per
the following pattern !
(1)
ö
ö
ö
2)
Vane
Rotor
Pin
1
2
3
4
1
2
7
5
3
6
4
Rotor :
Side surfaces and vane slots should be free of scratches. Side feeds, vane slots and holdout pin
orifices should be free of any contamination. Serration(driving splines) should not be deformed
by the shaft.
Ι
Parts
Parts must be kept clean at all time. If cleaning is needed, solvent is to be used. It is needed to
check and oil the inner parts before assembly.
In case of replacement of parts with mulitiple numbers, such as vanes and holdout pins, all the
parts are to be changed.
Vanes
The faces and edges should be free of scratch from contamination. Vanes should move
smoothly in the rotor slots, without excessive clearance. Edges may be stoned with