Service Bulletin Number 95-7

10 November 1995

SERVICE BULLETIN

Number 95-7

NEW STYLE CROSSPORT AND SINGLING PLATE

In conjunction with an overall effort to reduce potential leakage and as part of a SAE O-ring program a new method had been designed to crossport and single an MSP or MXP divider block. The old method utilized a transfer bar and hollow bolts that were threaded into the indicator ports on the front of the working sections. This method was susceptible to potential leakage due to the height tolerance of individual blocks, and would occupy an indicator port on each of the blocks that was being crossported. This new method will leave the indicator ports free for use. In addition, all MSP and MXP working sections now will have an O-ring style indicator port, which will not accept the old style crossport and singling bar. Therefore, the old style bar will no longer be available.

The new method uses a porting plate that is installed between the working section and the base section. The plate is O-ring sealed and is clamped in place using longer Valve Section Mounting Screws. The part numbers for kits which include the plate itself, O-rings, and a set of longer mounting screws are also available.

Figure 1

CRITICAL NOTE: Lubrication line must be connected to cross ported section furthest from feeder input or SYSTEM BLOCKAGE will occur.

There are two VERY IMPORTANT issues when using the new plate:

When two blocks are being crossported, (1) the one closest to the inlet section is the one the plate must be place under, and (2) the plumbing MUST be attached to the block that does not have the plate under it (see Fig. 1 and Fig. 2). The block that is being either singled or crossported will be recognized by the fact that it is elevated approximately 0.300 inches (3/16" approx.) higher than the other sections.

The plates are also wider than the other sections. The plates are also wider than the working section and stamped on the portion that extends beyond the working section. The stamping will either be a "CP RIGHT" on the right side of the plate for a crossport right plate, a "CP LEFT" on the left side of the plate for a crossport left, a "CP RIGHT" on the right and a "CP LEFT" on the left for a crossport both, or a "SINGLE" on both sides for a singling plate.

EXAMPLE:

CROSSPORTING OF BLOCK "A" & "B" ON THE RIGHT SIDE.

THE PLATE HAS TO BE UNDER BLOCK "A" AND THE PIPING HAS TO BE ATTACHED TO BLOCK "B".

Figure 2