Necessary Repairing Tools - Makita DDF481 Technical Information

R
epair
CAUTION: Repair the machine in accordance with "Instruction manual" or "Safety instructions".

[1] NECESSARY REPAIRING TOOLS

Code No. Description
1R264 Torque wrench
1R291 Retaining ring S and R pliers
1R298 Hex bar 10 with square socket removing Drill chuck
1R359 Chuck removing tool
1R404 Drill chuck removing tool
1R404-A Frame assembly
1R404-B Frame support
1R404-C Pinion gear complete
921477-5 M8x55 Hex bolt
922127-5 M4x16 Hex socket head bolt
---
Hex wrench 10
[2] LUBRICATION
It is not required to lubricate, because this product has gear mechanism of factory assembled.
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Drill chuck
DISASSEMBLING
Note: When Gear assembly is replaced with a new one, separate Drill chuck from
Gear assembly in advance. When the repair is independent of Gear assembly,
it is not necessary to separate Drill chuck from Gear assembly.
(1) Remove four 4x18 Tapping screws, and then separate Gear assembly from
Housing set. (Fig. 1)
(2) Remove M6x22 (-) Flat head screw by turning it clockwise with Slotted
screwdriver.
Note: Use Impact driver to unscrew M6x22 (-) Flat head screw if it cannot be
removed manually. (Fig. 2)
(3) Engage 1R404-C with Gear teeth in Gear assembly. (Fig. 2)
(4) Fit two Pins 4 of 1R404-A into the holes of Gear assembly. (Fig. 3)
Secure Gear assembly to 1R404-A by tightening two 922127-5. (Fig. 3)
Be careful about each direction. (Figs. 3 and 4
(5) Assemble 1R404-B to 1R404-A so that the lever portion of Gear assembly can
be pushed toward 1st gear position. (Fig. 5)
Note: Face the flat surface of the shaft of
1R404-C to the threaded hole in
1R404-B, and pass the shaft through
the hole of 1R404-B. (Fig. 6)
Fig. 5
921477-5 (2 pcs.)
1R404-B
Lever portion of
Gear assembly
removing Drill chuck
removing Retaining ring (INT) R-15
removing Drill chuck (If it is impossible to remove Drill chuck by the steps
removing Drill chuck without disassembling Gear assembly
the components of Drill chuck removing tool (1R404)
removing Drill chuck
)
Fig. 3
Lever portion of Gear assembly
1R404-A
Narrow side
Fig. 6
Shaft of
1R404-C
Use for
mentioned here)
Pin 4 (2 pcs.) of
1R404-A
Wide side
Face the flat surface to
M5x10 Thumb screw.
M5x10 Thumb screw
of 1R404-B
P 2/ 11
Fig. 1
4x18 Tapping
screw (4 pcs.)
Fig. 2
M6x22 (-) flat head screw
Drill chuck
Gear assembly
1R404-C
Fig. 4
922127-5
(2 pcs.)
1R404-A