JETStream 3000 series, Operation Manual, Page: 45 / 84

Bareshaft Pump
37
Note:
On 40K fluid ends, the brass sleeve
(Figure 54) inside the stuffing box does
not need to be removed unless the
plunger shows evidence of rubbing on
the sleeve.
11. Remove the O-ring (Figure 56) from the gland
nut.
12. Repeat the previous steps for the remaining
stuffing boxes if packing is to be replaced.
Inspection
1. Inspect the plunger for scratched or deep
scores. Discard damaged plungers.
2. On 40K units, measure the diameter of the
guide bushing (Figure 56, A). If the diameter
exceeds the Dimension A specification listed in
the “40K Guide Bushing Replacement Table”
below, replace the bushing. If the bushing
shows scoring or if the edge is chipped, re-
place the bushing.
40K Guide Bushing Replacement Diameter
Fluid End Plunger Size Dimension A
3040 # 5 0.533 in. (13.54 mm)
3640 # 6 0.603 in. (15.32 mm)
4240 # 7 0.673 in. (17.09 mm)
4240 # 8 0.733 in. (18.62 mm)
1
2
3
4 5
6
7
1. Plunger
2. Gland Nut
3. O-Ring
4. Guide Bushing 5. Packing
6.
Stuffing Box
7. Uni-Valve
Figure 54: 40K Fluid End (Some Components Not Shown).
Figure 56: Guide Bushing Check (40K Only).
This side into
gland nut
A
Figure 55: 15K/20K Fluid End (Some Components Not Shown).
1
8
7
6
5
4
3
2
1. Plunger
2. Gland Nut
3. Guide Bushing
4. Packing 5.
6.
Stuffing Box
7. Face Seal
8. Uni-Valve
Brass Sleeve w/ O-ring