Makita DCS550 Technical Information page 8

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -3. Gear Unit (that engages with Armature) (cont.)
ASSEMBLING
1) Assemble Helical gear 35 to Gear shaft by following the steps below (Fig. 21):
1. Put Gear shaft on 1R032 with the smaller diameter end of Gear shaft in the center hole of 1R032.
2. Insert Helical gear 35 through Gear shaft.
3. Apply 1R028 to Helical gear 35.
4. Press down 1R028 with arbor press.
2) Assemble Ball bearing 6900ZZ to Gear shaft by following the steps below (Fig. 22):
1. Put the unit you have assembled in the step 1) on 1R032.
2. Insert Ball bearing 6900ZZ through Gear shaft.
3. Apply 1R027 to Ball bearing 6900ZZ.
4. Press down 1R027 with arbor press.
3) Assemble Helical gear 15 to Gear shaft by following the steps below (Fig. 23):
1. Put the unit you have assembled in the step 2) on 1R032.
2. Insert Helical gear 15 through Gear shaft.
3. Apply 1R027 to Helical gear 15.
4. Press down 1R027 with arbor press.
4) Assemble Ball bearing 604ZZ to Gear shaft by following the steps below (Fig. 24):
1. Put the unit you have assembled in the step 3) on Ball bearing 604ZZ.
2. Press down the unit with arbor press.
Fig. 21
Arbor press
1R028
Gear shaft
Helical gear 35
1R032
Helical gear 35
flanged portion
of Gear shaft
Note: Be sure to press down 1R028
until it stops so that Helical gear 35
contacts the flanged portion of Gear
shaft.
Fig. 24
Arbor press
Ball bearing
604ZZ
Fig. 22
Arbor press
1R027
Ball Bearing
6900ZZ
Helical gear 35
1R032
Ball Bearing
6900ZZ
raised center of
Helical gear 35
Note: Be sure to press down 1R027
until it stops so that Ball bearing
6900ZZ contacts the raised center of
Helical gear 35.
Completion of Gear unit
Helical gear 15
Ball bearing 6900ZZ
Helical gear 35
Ball bearing 604ZZ
Fig. 23
Arbor press
1R027
Helical gear 15
Ball Bearing
6900ZZ
Helical gear 35
1R032
Helical gear 15
stepped portion
of Helical gear 35
Note: Be sure to press down 1R027
until it stops so that Helical gear 15
contacts the stepped portion of Gear
shaft.
P 8 /13