10
⑴
stuffing box (2) Bolt (3) Shim (4) O ring (5) spring (6) two-lip oil seal (7) Sealing ring (8) O ring (9)
Locking spring (10) Bolt (11) Bolt (12) O-ring
Refer to Figure 4, remove the stuffing box
○
1 and mud apron so that crosshead is at the front of the
stroke; thoroughly clean the front of the crosshead and the face of the crosshead extension rod.
Mount position boss of extension rod to the crosshead and tighten the retainer bolts
○
2 , the torque is
475~500N.m (350~370ft.lbs), at last tighten with iron wire. Thoroughly clean mud apron and the face
of frame, on the “A” place in Fig. 4 mount washer
③
and bolt
⑩
,
tighten it and the torque is
120~160N.m (90~120ft.lbs).
Thoroughly clean the hole and the end face, and meanwhile clean exterior surface of stuffing box and
surface of flange stuffing box plate. Coat the exterior surface of stuffing box with light oil and install
O-ring
○
4 . Install stuffing box on the mud guard packing then tighten bolts as the following torque:
16~24N.m (12~18 ft .lbs).
The stuffing box packing assembly consists of two lip oil seal
○
6 , oil seal ring
○
7 , O-ring
○
12, O-ring
○
8
and lock spring
○
9 . Install the assembly as follows:
Method A:
a)
Remove spring
○
5 from two lip oil seal
○
6 and mount it on the exterior of the crosshead extension
rod with lip toward power end. Then install spring
○
5 on the oil seal lip, and slide them into the
stuffing box. See the following notes.
b)
Put the O-ring
○
12 into Oil Seal ring
○
7 . Install O-ring
○
12 and oil seal ring
○
7 on the extension rod
and then put it into stuffing box bore.
c)
Install the O-ring
○
8 in groove of stuffing box.
d)
Installation left/right double lip seal
○
6 in the Fig.4 as a).
Note: The double lip seal near power end can be replaced by single lip oil seal, but DO
NOT use the single lip seal in the outer position (fluid end).
e)
Install the locking spring
○
9
a)
Take down the stuffing box
○
1 from pump frame. Assemble two lip oil seal, oil seal ring
○
7 ,
O-ring
○
12, O-ring
○
8 and lock spring
○
9 in the stuffing box as per Fig. 4 of partial enlargement, and
then hook O-ring
○
4 over the cylindrical outside surface of the stuffing box
○
1 .
b)
Install the guide sleeve on the front end of Crosshead tension rod as per Fig.4, and coat light
lubricant on the outside surfaces of Crosshead tension rod and the guide sleeve.
c)
Mount the stuffing box assembly on Crosshead tension rod through the guide sleeve, pull it into
position by hand, and then fix the stuffing box
○
1 on the mud guard packing with spring washer
and bolt (11).
Note: must ensure the pressure spring (5) does not slip out of the groove in the oil seal lip,
as severe scoring of the crosshead extension rod can occur. Coat light lubricant on
extension rod for easy installation of the stuffing box assembly.
1.5. Spray Pump Assembly
Spray pump assembly consists of spray pump, water tank and spray nozzle etc. It functions flushing
and cooling piston and linear during pump operated.
Proper attention must be paid at all times to assure adequate cooling fluid is being applied to the
piston and liner assembly. Stoppage of the cooling fluid will result in almost instant failure of the
piston rubbers and possibly extensive damage to the liner.
