H.E.R.O. H2K 3819 Owner's Manual - Repair Procedures
Owner’s Manual
HK3819 / HK5523
Page 13
REPAIR PROCEDURES
1.
Slide o-rings (Ref # 14 & 15) onto the piston valve body (Ref # 13). It is recommended to lubricate with a
common grease or piston lube before sliding on.
2.
Drop ball (Ref # 16) into piston valve.
3.
Insert piston valve washer (Ref # 17) into piston valve.
4.
Apply Loc-Tite 271 (Red) to threads of seat (Ref # 13), and screw tight using your Uni-Tool.
5.
Apply a small amount of grease (common grease or piston lube) into the “V” portion of each packing set
component. Re-assemble and squeeze packing set together. Remove any excess grease (leave a small
portion) from the outer perimeter. NOTE: Our testing has shown that a longer packing life is obtained when
the seals are pre-lubricated in the manner described above.
6.
Slide the lubricated, lower packing assembly onto piston valve.
7.
Slide the flat washer onto piston valve.
8.
Slide piston sleeve (Ref # 12) onto piston valve, with the four (4) holes closest to the lower packings.
9.
Assemble the back up ring (Ref # 19) and cylinder o-ring (Ref # 20) onto cylinder. The cylinder o-rings are
always placed on the inner side of the cylinder, facing each other. Back up o-rings are always on the outer
side of the cylinder (Far ends).
10. Slide cylinder (Ref # 21) over the piston valve and lower packings. Ensure the cylinder four (4) outlet holes
are at the top (refer to diagram).
11. Insert upper cylinder clip (Ref # 22) into the cylinder. NOTE: This clip will remain in the cylinder during
dismantling and needn’t be removed.
12. Slide the lubricated, upper packing assembly (see step 7 & 8) into the cylinder until only approximately 1/8”
of packings is exposed above the cylinder.
13. With piston cartridge assembly fully assembled, move back to the unit and tighten the four (4) intake
manifold bolts (Ref # 38) to 30 foot pounds or with Uni-tool as shown in Fig # 1. (Loosened in step 4 of
removal instruction on page 9).
14. Insert the fully assembled piston cartridge assembly (Ref # 11) into the manifold (Ref # 39) and thread into
the con-rod coupler (Ref # 69) as shown in Fig # 2. Tighten to 30 foot pounds.
15. Install intake valve assembly (Ref # 25) as shown in Fig # 3 & 4.
16. Re-attach intake siphon assembly and repairs are complete.
PISTON CARTRIDGE ASSEMBLY REPAIRS – ASSEMBLY
Fig #1
Fig #2
Fig #3
Fig #4