Hitachi DH 52ME, Service Manual

-10- 

(4) Reassembly of the slip clutch ass’y 

(a) Press-fit the Collar 

[129] {139}

 and Ball Bearing 6002DD 

[130] {140}

 in this order to the Bevel Pinion 

[127] {137}

, and then insert the Washer 

[131] {141}

 and Washer (A) 

[132] {142}

 in this order.   

(b) Mount the Feather Key 

[128] {138}

 to the Bevel Pinion 

[127] {137}

 and then press-fit the Gear 

Holder 

[133] {143}

.  

(c) Insert the Second Gear 

[136] {146}

 into the outer periphery of the Gear Holder 

[133] {143}

.  

NOTE: Apply Hitachi Motor Grease No. 29 to the inner periphery of the Second Gear [136] 

{146} in advance. 

(d) Insert the eight Needle Pins D6 x 6 

[134] {144} 

upright as shown below, and then push in eight 

Springs (C) 

[135] {145}

.  

(e) Fill up the slotted groove and through-hole portions of the Gear Holder 

[133] {143}

 with Hitachi Motor 

Grease No. 29, and then press-fit the Spacer 

[137] {147}

 and Ball Bearing 629VV 

[138] {148}

 in this 

order to the Bevel Pinion 

[127] {137}

.

(5) Reassembly of the vibration reduction mechanism 

(a) Apply Hitachi Motor Grease No. 29 to the Washer 

{109}

 and adhere it to the end face of the hole 

portion of the Weight 

{110}

. 

(b) Insert the Weight 

{110}

 into the Base 

{116}

, and then insert the Weight Pin 

{112}

.  

NOTE: At this time, apply Hitachi Motor Grease No. 29 to the Weight Pin {112}. 

(c) Sandwich the Base 

{116}

 between Leaf Spring (A) 

{114}

 and the Spring Holder 

{115}

 engaging the 

convex portion of the Base 

{116}

 with the concave 

portion of the Spring Holder 

{115}

, and then secure 

it with the Bolt M5 x 16 

{118}

.  

NOTE: At this time, apply Hitachi Motor Grease 

No. 29 to the tip of Leaf Spring (A) {114} 

where the Weight {110} will contact. 

(d) Insert the two Weight Bumpers 

{117}

 into the back 

of the Base 

{116}

 so that the rounded portion of the 

Weight Bumper 

{117}

 contacts the Weight 

{110}

. 

(e) Fit two Cylinder O-rings (B) 

{108}

 around the 

Weight 

{110}

 without twisting. 

[127]{137} 

[132]{142} 

[136]{146} 

[138]{148} 

[137]{147} 

[130]{140} 

[129]{139} 

[127]{137} 

[133]{143} 

[134]{144} 

[135]{145} 

[128]{138} 

A

A

Slotted groove in 
the gear holder 

Section 

A

—

A

[131]{141} 

{108}

{114} 

{114} 

{109}

{112} 

{118} 

{115} 

{117} 

{110} 

{116} 

{115} 

{118}