Mitsubishi Electric RH-12FRH Series Instruction Manual Download Page 144

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5-131

Maintenance and inspection procedures

5 Maintenance and Inspection

［Caution］
・ The brand name of the grease shown in the

Table 5-10

is the grease put in at shipping.

・ The lubrication interval is a cumulative value of the operation at the maximum speed. If the operation has been

suspended, or if the designated speed is slow, the lubrication time can be lengthened in proportion.

・Depending on the robot operation state, the lubrication interval will fluctuate, so determine the time according to

the state so that the grease does not run out. For the shaft, the lubrication interval should be shorter than one
in

Table 5-10

when the operation is repeated with a short stroke.

･ By the maintenance forecast function of RT ToolBox3 (option) computes the guide of the lubrication hours put

together with the customer's operation status.

・ The numbers in the

Table 5-10

correspond to the supply positions in

Fig. 5-23

・When the specified time limit (24,000 Hr) is due, the overhaul work to replace internal grease is required. For the

J1/J2 axis reduction gears, if the overhaul cannot be conducted at the specified timing, lubricate them at the
lubrication interval in

Table 5-10

For the overhaul, contact the dealer.

■ Lubrication method to the J1, J2 axis

1) Turn off the controller's power supply.
2) Refer to the

"5.3.2Installing/removing the cover"

and remove the covers.

3) In RH-6FRH series, remove the screw from the J1 axis lubrication port, and install the attached grease nip

ple. Securely tighten the grease nipple by 4.7 N·m to 6.3 N·m.

4) Insert the grease shown in

Table 5-10

using a grease gun from the lubrication grease nipple. Add only the

specified amount of grease. Adding excess grease may cause grease to leak.

Use manual grease gun, and inject grease with pressure 0.03Mpa or less. Do not use
the grease gun, which derived by the factory air presser to avoid injecting by too high
pressure.
A grease gun that fits the grease nipple is required.
Recommended grease gun: KH-120 (amount: 140ml) or KH-32 (amount: 200ml)

(manufacture: Yamada Corporation Inc.,)

The grease guns come with a short nozzle (HSP-1) as standard. If this short nozzle
does not reach the desired areas, depending on the robot model and installation loca

tion, it may be useful to use a long nozzle (HSP-2).

5) In RH-6FRH series, removes the grease nipple installed above and installs the original screw. Securely

tighten the screw by 4.7 N·m to 6.3 N·m.

6) Install the removed cover as before.

Note) Sealant is applied to the installation surface of the cover in the oil mist and clean specification mod

els. Be sure to replace the sealant if it has been dislocated and bent or crushed and does not return
to its original shape. If the sealant is required to be replaced, contact the dealer.

7) If the maintenance forecast function is enable, please reset the accumulated data about grease. Carries out

the resetting operation by RT ToolBox3 (option) or parameter MFGRST. Refer to separate "RT ToolBox3/
RT ToolBox3 mini User's Manual" for the operation method of RT ToolBox3, and refer to separate
"Instruction Manual/Detailed Explanation of Functions and Operations" for details of parameter MFGRST.

The lubricating to J1 and J2 axes is completed.

RH-12FRH/20FRH series

<1>

J1 axis reduction gears

Grease nipple
WA-610(Only addition)

4B No.2
(Harmonic Drive Systems Inc.)

24,000 Hr

16 g

Battery cover

<2>

J2 axis reduction gears

Grease nipple
WB-610(Only addition)