105400-4201 ZEXEL 9 420 612 839 BOSCH GOVERNOR 9420612839 1054004201 8944501081

1. Remove the seat retaining ring (1) and pin (2). 2. Remove the seat (3), bolt (4), washers (5) and spring (6).3. Remove the sleeve and bearing assembly from the cylinder and weight assemblies. 4. Remove the retaining ring (7) from sleeve (8).5. Remove bearing (9) and races (10) from sleeve (8). 6. Remove the valve (11) from piston (12).7. Remove the cylinder-to-weight assembly retaining ring (13).8. Remove the weight assembly (14).9. Remove piston (12) and sleeve (15) from the cylinder (16).10. Remove the O-ring seal from the sleeve (15). 11. Remove the speed limiter plug (17), spring (18), and plunger (19) from the governor housing.12. Remove the high idle screw (21) and low idle screw (20). 13. Remove the lever assembly-to-shaft assembly retaining bolt (23) and lock.14. Remove the shaft assembly (22) and lever assembly (24) from governor housing.15. Remove the seal from governor housing. 16. Remove two retaining bolts (25) and lock. Remove the lever (26) and shaft (27) from idle screw housing.17. Remove two seals and bearing from idle screw housing.Assemble Governor
1. Using tool (A) install the inner seal in idle screw housing with spring side of seal facing the driver. Install bearing and outer seal with lip of the seal toward the inside of the housing. Lubricate lip of seal with clean SAE 30 engine oil.2. Position the shaft and lever in the idle screw housing. Install the retaining bolts and lock. 3. Using tool (A), install the seal in the governor housing with spring side of seal toward inside of governor housing. Lubricate lip of seal with clean SAE 30 engine oil.4. Position the lever assembly and shaft in the governor housing. Install the retaining bolt and lock.5. Install the high and low idle screws in the governor housing.6. Install the speed limiter plug, spring, and plunger in the governor housing. 7. Install the O-ring seal (3) on sleeve (4).8. Install piston (2) and sleeve (4) in the cylinder (1). 9. Position the weight assembly (6) on cylinder (7), and install retaining ring (5). 10. Install the valve (9) in piston (10).11. Install the bearing and races in sleeve. Install retaining ring. Install the sleeve and bearing assembly (8) on valve (9). 12. Position the seat (12), bolt (11), washers and spring on the valve (9). Install the retaining pin (14) and retaining ring (13).concluding step: a) connect governor to fuel injection pump housing