MUELLER CO. 107 Instructions Manual

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Page 1

Bonnet Repair Kit Instructions

SCREW PIN

HOLD DOWN NUT

OPERATING SCREW

BEARING

SHOULDER

(STEP 14)

STEM NUT

STEM NUT SEAL

WIPER RING

UPPER STEM SEAL

Bold items are included in kit.

107 Fire Hydrants

OPERATING NUT/WEATHER CAP

OPERATING SCREW SEAL

BEARING SEAL

ANTI-FRICTION WASHER

OPERATING SCREW

BONNET

BONNET GASKET

UPPER BARREL

STEM

CAUTION: In order to properly identify the various “O” rings and gaskets included in this kit, carefully observe the locations and relative sizes of “O” rings and gaskets as you remove parts from the hydrant. As old “O” rings and gaskets are removed, match them up with the new ones by comparing sizes.

1. Remove Bonnet Bolts. Rotate Operating Nut in opening direction to fully open position while

holding Bonnet to prevent it from turning. This lifts Bonnet o Upper Barrel.

2. Rotate complete Bonnet assembly counterclockwise to detach it from upper Stem threads.

Lift o.

3. Remove socket head Screw Pin and lift o combined Operating Nut/Weather Cap.

4. Remove Hold Down Nut. Empty oil from Bonnet.

5. Lift out Operating Screw, Operating Screw Bearing, Anti-Friction Washer and Stem Nut through top of Bonnet as a unit.

6. Remove Operating Screw Bearing from assembly and replace Bearing Seal.

7. Remove Operating Stem from Stem Nut.

8. Remove Operating Screw Seal and Anti-Friction Washer from Operating Stem.

9. Install new Anti-Friction Washer and new Operating Screw Seal on Operating Stem in that order.

10. Remove Stem Nut Seal (Quad Ring) and Wiper Ring from lower area of Bonnet. Replace both

with new parts from kit.

11. Remove oil from Stem Nut. Rell with Mueller Hydrant Lubricant (approx. 2 oz.) while part is setting level. Oil level should be at bottom of oval slots in sides of Stem Nut.

12. Insert Operating Screw into Stem Nut taking care not to spill oil. Engage several threads only.

13. Reinstall Stem Nut into Bonnet with lugs engaging grooves in Bonnet.

(continued)

Page 2

Bonnet Repair Kit Instructions (continued)

14. Turn Operating Stem until its thrust collar is slightly below the shoulder inside the Bonnet (see illustration).

15. Install Operating Screw Bearing, engaging lugs in grooves inside Bonnet.

16. Reinstall Hold Down Nut and tighten.

17. Reinstall Operating Nut and Weather Cap and secure with Screw Pin.

18. Replace Upper Stem Seal and lubricate threads on Stem.

19. Replace Bonnet Gasket.

20. Rotate Operating Nut to fully open position, extending Stem Nut.

21. Position assembled Bonnet on top of stem and rotate clockwise as far as possible.

22. Hold Bonnet to prevent it from turning and rotate Operating Nut in closing direction (this lowers the Bonnet onto the Upper Barrel). Align bolt holes by rotating Bonnet counterclockwise. Rotate only enough for alignment.

23. With all bolts in Bonnet, turn Operating Nut using the same torque as normally used to close hydrant. Tighten all Bonnet Bolts and Nuts. To check Bonnet Gasket Seal, open one hose cap slightly. Open hydrant until barrel lls with water, tighten hose cap, open hydrant fully, check gasket for leakage, then turn Operating Nut to fully closed position.

Phone: (800) 423-1323

By deviating from the above listed instructions, you will void any product warranty and release Mueller Co. and its aliated entities

from any and all liability associated with the installation or use of this product. For details on the product’s warranty, terms, and conditions, please visit www.muellercompany.com.