Service manual

FUEL INJECTION

PUMP

Measure the rack (Figure 5-60,

(4))

movement,

Install the rack return spring (Figure 5-61,

(1)).

the range of rack motion should be The spring must be able to return the rack from

approximately 14 mm of total travel. the maximum decreased fuel position to the

8. Measure rack backlash, the total backlash

maximum increased fuel position.

should be equal to or less than 0.008 in.

(0.2 mm). If the backlash is excessive, replace

the rack assembly and control sleeve.

Figure 5-61

1. Control Rack 4. Rack

Guide 5. Upper Spring

Control Sleeve Retainer

Rack Auxiliary

Distribution Shaft

Spring Sleeve

Figure 5-60

YANMAR,,

Series Service Manual

10. Install the plunger spring (Figure 5-62, (1)) and

spring retainer (Figure 5-62,

(2)).

Use the

spring compressor tool (Figure 5-63, (2))

(Included in Yanmar Special Tool Kit

458091) to compress the plunger spring and

install the spring retainer.

OKl12128

Figure 5-62