4.
4-1
4-2
4-3
4-4
4-5
5.
5-1
5-2
5-3
5-4
5-5
1.
2.
Reassembling the hand pump:
(All the O-rings should be renewed.)
Assemble piston CP (4) to pump body (1) and install stop plug (19, {18}). In case of MVH-R60, install
accumulator case (15), piston ring (14) and cylinder CP (3) as well.
4-2 Within the pump body, insert control shaft (8,{7}) to cam COMP (A) and retain it with spring pin
(20,{13}). Be sure to use bonding agent (Loctite 638) for installation of bush (9,{8}). inner O-ring (30,{27}),
outer O-ring (31,{26}) as well as bush and pump body (1).
Insert stopper (22,{16}) and install blank plug (23,{17}).
Insert spring (16, 17, {14}) and install spring retainer (18) or hose joint ({19}).
Assemble cover (2) with hex socket head bolts and install breather (21) as well as its cover.
Install the hand pump to the machine and conduct test run:
Connect hydraulic hose to the hand pump assembly and insert it into handle before locking it with neces-
sary parts.
Fix the hydraulic hose to the handle with clamp and install the hose to the cylinder on vibrator side.
With breather bolt at the cylinder top loosened, remove cover (2) and fill the hose and cylinder with oil (#46:
Hydraulic oil). Tighten the bolts after venting air.
With the handle erected, fill the hand pump assembly with appropriate amount of oil before reinstalling the
cover (2).
After conducting test run, vent air again and check the oil tank of hand pump assembly for proper level.
Traveling deficiency due to dust entering piston CP:
Remove and isolate the hand pump assembly from machine. With cover (2) removed and hydraulic oil
drained, place travel lever in reverse position and invert the pump. Pour illuminating kerosine from hose
joint (spring retainer) side to clean and blow off any dust with air pressure. Or, clean it by disassembling
completely in such manner as shown above.
Traveling deficiency due to broken spring pin (20, {13}) inside the hand pump, such as caused by forcibly
operating the travel lever when engine is not running:
Replace the spring pin after cleaning the oil tank in hand pump assembly. Or, clean the tank and replace
the spring pin by completely disassembling it as shown above.
TROUBLE DUE TO HAND PUMP AND REMEDY:
20
