Moving Parts Hazard

Service

8.With your fingers, snap the slide blocks (119) off of the valve carriage (111) to free the o-rings (120). Clean and inspect the slide blocks. See Fig. 8.

9.Remove the screws (104) and disassemble the bearing retainers (122), bearing rollers (121), and pins (123). Clean and inspect these parts.

10.Clean and inspect the valve carriage (111). Re- move and replace the bearings (107}).

11.To disassemble the detents:

NOTE: If you are using Detent Kit 222982, it is not necessary to disassemble the detents. Just replace the

old detents with the new ones provided in the kit (see Reassembly, step 9).

a.Hold the detent roller (115) with a pliers while turning the plunger guide (113) slightly with a wrench, until the locking tabs of the guide disengage from the windows in the plunger (114). See Fig. 5.

b.Use a flatblade screwdriver to pry out the detent roller (115) and pin (117). See Fig. 8.

113

115

02249

Fig. 5

12. To disassemble the trip rod:

NOTE: If you are using Trip Rod Kit 222981, it is not necessary to disassemble the trip rod. Just replace the

old trip rod with the new one provided in the kit (see Reassembly, step 3).

WARNING

Use caution when disassembling the trip

rod. The trip rod spring (110) is under tension. When the trip rod is unscrewed

tension is released, and parts may be projected through the air with considerable force.

14 308213

a.Place the flats of one trip rod (106) in a vise with soft jaws and unscrew the other trip rod (106) with a wrench. Be careful not to scratch the trip rods (106). See Fig. 8.

b.Disassemble the trip rod assembly. Inspect the press-fit bearings (129) in place in the spring guides (108). Clean and inspect all parts.

13.Inspect the two detent plates (105) in place on the valve housing (101). Remove if worn or damaged.

14.Inspect the carriage bumpers (128) and replace if worn or damaged.

Reassembly

1.Install the detent plates (105) on the valve housing

(101). Apply thread sealant and torque the screws

(104)to 9 N.m (75 in-lb). Lubricate the plates with heavy-duty lithium grease. See Fig. 8.

2.Assemble the trip rod.

NOTE: If you are using Trip Rod Kit 222981, it is not necessary to assemble the trip rod. Skip steps a through c, and go to step 3.

a.Press fit the bearings (129) flush with the inside surface of the spring guides (108). Apply thread sealant to one of the trip rods (106) and screw the shaft (109) onto the rod.

b.Install the spring guides (108) in the spring (110), with the flanges facing out. Apply thread sealant to the second trip rod and slide both trip rods into the spring guides.

c.Compress the spring so the shaft (109) and trip rod engage two or three threads. Place the flats of one trip rod in a vise with soft jaws. Use a wrench on the flats of the other rod and torque to 17–23 NSm (150–200 in-lb).

3.Install the trip rod assembly (T}) in the housing (101). Grease the ends of the trip rod. See Fig. 4.

4.Lubricate the seal (102{}) and slide it onto the trip

rod (T}) and into the top hole of the housing (101) with the lips facing into the housing. Lubricate the rod fitting (103{}) and install in the housing (see Fig. 4). Apply thread sealant and torque the screws (104) to 2–3 NSm (20–30 in-lb). Repeat for the bottom of the housing.