Makino HMC

Dear Experts
In our machine, when APC goes down then there is huge noise but downward movement quite smooth if fixtures removed from both sides of APC arm
We have tried by swapping valves including pilot operated valve but to no avail
Also tried to slow down APC down movements by adjusting flow control valve - but no change
Observed cylinder OD and pinion ID got rusted. And there was minor leakage from return line from Up/Down Cylinder.
We plan to replace following spares as per Makino's recommendation

Part.. No Description Vendor Item Manufacturer Qty

Z279K3116060 HEX SOCKET HEAD SHOULDER BOLT SH16X60 GOSHO 1

29M120B2013 GASKET 1

Z275N0211003 DIN WASHER DIN6340-17 TOKOU SANSHOU 1

Z271B1110045 SOCKET HEAD CAP SCREW M10X45 12

Z228A5140913 BEARING 51409 FAG 1

Z261A3108001 O-RING B2401-P80 MITSUBISHI ELEC.WIRE IND. 1

Z269A0708001 BACK-UP RING SUN-2BP-80 MITSUBISHI ELEC.WIRE IND. 1

Z261A3311001 O-RING B2401-G110 MITSUBISHI ELEC.WIRE IND. 1

Z261A3101601 O-RING B2401-P16 MITSUBISHI ELEC.WIRE IND. 1

Z261A3320001 O-RING B2401-G200 1

Z261F1803650 V SEAL RING VR365 OHTE 1

Z247M0099022 OILES #500 BUSH SPB-15017080 OILES 2

Z271B1106012 SOCKET HEAD CAP SCREW M6X12 GOSHO 1

Z275N0211010 DIN WASHER DIN6340-6.4 TOKOU SANSHOU 1

Z261A3102001 O-RING B2401-P20 MITSUBISHI ELEC.WIRE IND. 1

Z269A0702001 BACK-UP RING SUN-2BP-20 DAINICHI 2

Z261A3110501 O-RING B2401-P105 MITSUBISHI ELEC.WIRE IND. 1

Z269A0710501 BACK-UP RING SUN-2BP-105 DAINICHI 2

20M120A433=1 CUSHION RING 1

Z271B1106050 SOCKET HEAD CAP SCREW M6X50 4

29M120A2021 BEARING CAP (0029-0155) 1

Z271R1105008 TRUSS HEAD SCREW M5X8 KITAGAWA CO.,LT 6

Z261A3101201 O-RING P12 MITSUBISHI ELEC.WIRE IND. 2

29M120A2005=1 CYLINDER (0029-0129=1) 1

Z271B1120080 SOCKET HEAD CAP SCREW M20X80 6

Z275A3102000 WASHER M20 6

29M120A2007 PIN (0029-0131) 1

Z261A3103401 O-RING B2401-P34 (TYPE 2) MITSUBISHI ELEC.WIRE IND. 1

29M120A2006=1 PISTON 1

Z271B1120080 SOCKET HEAD CAP SCREW M20X80 6

Z275A3102000 WASHER M20 6

Z261A3110501 O-RING B2401-P105 MITSUBISHI ELEC.WIRE IND. 1

Z269A0710501 BACK-UP RING SUN-2BP-105 DAINICHI 2

29M120A2008 BEARING CASE (0029-0142) 1

20M120A402=1 CYLINDER CAP 1

Z271B1108025 SOCKET HEAD CAP SCREW M8X25 M8x25 12

We are not sure if this wud fix the issue
Request to let us have your feedback,

Regards

Part.. No	Description	Vendor Item	Manufacturer	Qty
Z279K3116060	HEX SOCKET HEAD SHOULDER BOLT	SH16X60	GOSHO	1
29M120B2013	GASKET			1
Z275N0211003	DIN WASHER	DIN6340-17	TOKOU SANSHOU	1
Z271B1110045	SOCKET HEAD CAP SCREW	M10X45		12
Z228A5140913	BEARING	51409	FAG	1
Z261A3108001	O-RING	B2401-P80	MITSUBISHI ELEC.WIRE IND.	1
Z269A0708001	BACK-UP RING	SUN-2BP-80	MITSUBISHI ELEC.WIRE IND.	1
Z261A3311001	O-RING	B2401-G110	MITSUBISHI ELEC.WIRE IND.	1
Z261A3101601	O-RING	B2401-P16	MITSUBISHI ELEC.WIRE IND.	1
Z261A3320001	O-RING	B2401-G200		1
Z261F1803650	V SEAL RING	VR365	OHTE	1
Z247M0099022	OILES #500 BUSH	SPB-15017080	OILES	2
Z271B1106012	SOCKET HEAD CAP SCREW	M6X12	GOSHO	1
Z275N0211010	DIN WASHER	DIN6340-6.4	TOKOU SANSHOU	1
Z261A3102001	O-RING	B2401-P20	MITSUBISHI ELEC.WIRE IND.	1
Z269A0702001	BACK-UP RING	SUN-2BP-20	DAINICHI	2
Z261A3110501	O-RING	B2401-P105	MITSUBISHI ELEC.WIRE IND.	1
Z269A0710501	BACK-UP RING	SUN-2BP-105	DAINICHI	2
20M120A433=1	CUSHION RING			1
Z271B1106050	SOCKET HEAD CAP SCREW	M6X50		4
29M120A2021	BEARING CAP	(0029-0155)		1
Z271R1105008	TRUSS HEAD SCREW	M5X8	KITAGAWA CO.,LT	6
Z261A3101201	O-RING	P12	MITSUBISHI ELEC.WIRE IND.	2
29M120A2005=1	CYLINDER	(0029-0129=1)		1
Z271B1120080	SOCKET HEAD CAP SCREW	M20X80		6
Z275A3102000	WASHER	M20		6
29M120A2007	PIN	(0029-0131)		1
Z261A3103401	O-RING	B2401-P34 (TYPE 2)	MITSUBISHI ELEC.WIRE IND.	1
29M120A2006=1	PISTON			1
Z271B1120080	SOCKET HEAD CAP SCREW	M20X80		6
Z275A3102000	WASHER	M20		6
Z261A3110501	O-RING	B2401-P105	MITSUBISHI ELEC.WIRE IND.	1
Z269A0710501	BACK-UP RING	SUN-2BP-105	DAINICHI	2
29M120A2008	BEARING CASE	(0029-0142)		1
20M120A402=1	CYLINDER CAP			1
Z271B1108025	SOCKET HEAD CAP SCREW	M8X25	M8x25	12

Makino HMC - a81