Mendota M27 - Page 55

85-03-01120 M27 Page 55
5. Remove both rear and front burners. Locate and
identify the rear burner orifice spud and the
front burner orifice spud. Both front and rear
orifice spuds are removed and installed using a
½” deep well socket and ratchet.
6. Install rear burner orifice #65-14-00056(#56
drill) for the rear burner. Tighten down securely.
7. Install front burner orifice #65-14-00059 (#59
drill) for the front burner. Tighten down
securely.
8. Locate Pilot Light on right side of firebox. While
holding the pilot base body with large vice grips
tightly, loosen pilot light hood using a 7/16”
open end wrench on the hex shaped base. Rotate counter clock-wise ¼ turn to loosen. REMOVE THE PILOT HOOD.
9. Remove the NG Pilot Orifice Thimble (Pilot orifice thimble is located inside pilot hood base).
10. Insert the LP Pilot Orifice Thimble.
11. Thread on the pilot hood into pilot body base by hand until finger tight.
12. Tighten down hex shaped base of pilot using a 7/16” open end wrench.
CAUTION: Always use one 7/16” open end wrench and one large pliers or vice grips tool to hold, loosen and
tighten pilot hood base to prevent damage to pilot mount bracket.
Figure 4-7 Removing Orifices
Figure 4-8 Pilot Orifice
Figure 4-9 Pinch Pilot Base with Vice Grips