Replacing The Primer Cup - DARLEY 2BE6.5H Operator's Manual

1. Loosen the socket set screw (15) that locks the primer cylinder head (10) from unscrewing. It is not
necessary to remove the set screw all the way.
2. Unscrew the primer cylinder head (10).
3. Pull the primer piston rod (14) and piston cup (4) assembly out of the primer cylinder (5).
4. Remove the piston cup retaining nut (12), washer (17), and piston cup (4). Note the direction of the
piston cup. If the cup gets reinstalled backwards, the primer will not work. This will be evident by
difficulty pushing the piston cup into the cylinder during reassembly.
5. Clean the piston rod (14) threads with Loctite Klean "N" Prime or equivalent.
6. Install new piston cup (4) and piston retaining washer (17). The piston should cup towards the primer
handle (9).
Note: If the cup gets reinstalled backwards, the primer will not work. This will be
evident by extreme difficulty pushing the piston cup into the cylinder (5) in step
# 10.
7. Apply Loctite 243 to the threads of the piston rod (14)
8. Install the stainless steel hex nut (12).
Note: DO NOT allow the Loctite to get on any other parts.
9. Apply a small amount of marine grade grease to the inside diameter of the primer cylinder (5). Also
apply a light film of marine grade grease to the outside diameter of the piston cup (4). The grease is
used to aid both in sealing the cup for higher vacuum, as well as lubrication for smoother operation.
10. Push the primer piston cup (4) assembly into the primer cylinder (5).
11. Screw the cylinder head (10) onto the cylinder (5) all the way, then back it off until the drain slot in
the cylinder head is at the 4 o'clock position when installed on the pump unit.
12. Tighten the socket set screw (15) which locks the cylinder head (10) from unscrewing.
IF FURTHER INFORMATION IS NEEDED, CALL W.S. DARLEY & CO. IN
CHIPPEWA FALLS, WI. AT 800-634-7812 or 715-726-2650
Prepared by: TED
Approved by: MCR
© W.S. Darley & Co.

Replacing the Primer Cup

Refer to Drawing DGC0214
26
Rev. #: 13
15May2006
1200569.doc