JETStream 3000 series, Operation Manual, Page: 69 / 84

Bareshaft Pump
61
Crosshead and Connecting Rod
Assembly
Removal
1. Remove the crankshaft from the pump as
outlined in “Crankshaft” on page 65.
2. Use two people to lift the crosshead/connect-
ing rod assemblies from the crankcase. The
weight and location of the assemblies make it
difficult for one person to remove on their own.
Disassembly
1. Remove the two set screws from the cross-
head (Figure 121). The set screws are in-
stalled on top of one another in the same hole.
2. Slide the pin out from the assembly (Figure
122).
3. Remove the connecting rod from the crosshead.
4. Keep the components for each assembly
together.
5. Disassemble the remaining assemblies.
Bushing Inspection
1. Use a micrometer to measure the outer diam-
eter of the pin in three places and record the
measurements.
2. Add the three measurements and divide by 3
to get the average diameter.
3. Use an inside micrometer to measure the
bushing in the connecting rod in three places
and record the measurements.
4. Add the three measurements and divide by 3
to get the average diameter.
5. Subtract the diameter of the pin from the inside
diameter of the bushing. If the remainder is
greater than 0.008 in. (0.2 mm), the bushing
must be replaced. Note the new bushing will re-
quire honing after installation into the connect-
ing rod to achieve the clearance listed below.
Note:
New part clearances are as follows:
• Series 3000: 0.0030 in. (0.08 mm) - 0.0037
in. (0.09 mm)
• Series 3600/4200: 0.0040 in. (0.1 mm) -
0.0047 in. (0.12 mm)
6. Repeat for the remaining assemblies.
Figure 121: Set Screw Removal.
Figure 122: Pin Removal.
Pin
Crosshead