Makita GA7010C Technical Information page 2

R
epair
CAUTION: For your safety, before maintenance or repair, be sure to;
1. Disconnect the machine from the power source.
2. Remove the wheel from the machine.
[1] Necessary Repairing Tools
Tool No./ Description
1R035/ Bearing Setting Plate
1R045/ Gear Extractor (large)
1R229/ 1/4" Hex Shank Bit M5
1R269/ Bearing Extractor
1R291/ Retaining Ring S and R Pliers
1R340/ Bearing Retainer Wrench
[2] Lubrication
Put 40g of Makita grease SG. No.0 into the gear room of Gear housing
for a long gear life. (Fig. 1)
[3] Disassembling and Assembling
Note: As listed to left, the grinders use different
spiral bevel gears, and they are not
interchangeable.
Referring to this list, therefore, be sure to
use correct gears for replacement.
[3]-1. Replacing Armature, Smaller Spiral Bevel Gear and Ball Bearing 6201LLB
DISASSEMBLING
Note: Disassembling can be done without disassembling Gear
housing section.
1) After removing Carbon brushes, by removing four 5x30 Tapping
screws, Gear housing section can be separated from Motor housing.
2) Slide Gear housing cover until you see the corners on the end of
Motor housing. And then by striking two of the corners with plastic
hammer, the assembly of Armature and Gear housing cover can be
separated from Motor housing. (Fig. 2)
3) Remove Hex nut M6 by turning counterclockwise while holding
Armature firmly by hand. Now smaller Spiral bevel gear can be
removed from Armature shaft by hand.
4) Remove Gear housing cover from Armature using Gear Extractor,
large (No.1R045). (Fig. 3) Ball bearing 6201LLB is still on Gear
housing cover at this step. Therefore, remove the bearing with
arbor press and a round bar. (Fig. 4)
Fig. 3
Gear Extractor, large (No.1R045)
Press-fitting Ball bearings
Removing Gear housing cover and Bearing box
Removal/Installation of the Hex socket head bolts that fasten Bearing box
Removing ball bearing 608DDW on the commutator end of Armature shaft
Removal/Installation of the Retaining ring that retains larger Spiral bevel gear
Removal/Installation of Bearing retainer
Model No.
GA7010C
GA7011C
GA9010C
Gear housing cover
Ball bearing 6201LLB
Use for
Fig. 1
Gear room
Smaller spiral bevel gear
(on armature shaft)
11 teeth
9 teeth
Fig. 2
Fig. 4
Round bar
Gear housing cover
Ball bearing 6201LLB
P 2 / 6
Larger spiral bevel gear
(on spindle)
37 teeth
43 teeth
Slide Gear
housing cover.
Strike two corners
on the end of
Motor housing.