Komatsu PC78MR-6 Hydraulic Excavator Operation and Maintenance Manual - IRA Hydraulic Pump Technical support and service

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Products and services Komatsu PC78MR-6 Hydraulic Excavator Operation and Maintenance Manual

Bearing number:4T-26878/26822
Size (mm):38.1x79.375x23.812
Bore Diameter (mm):38,1
Outer Diameter (mm):79,375
Width (mm):23,812
d:38,1 mm
D:79,375 mm
T:23,812 mm
B:25,4 mm
C:19,05 mm
ra1 max.:0,8 mm
a:7,4 mm
Da:71 mm
db:44,5 mm
ra max.:0,8 mm
da:45 mm
Db:74 mm
Weight:0,574 Kg
Basic dynamic load rating (C):76,5 kN
Basic static load rating (C0):97,5 kN
(Grease) Lubrication Speed:4 800 r/min
(Oil) Lubrication Speed:6 400 r/min
Calculation factor (e):0,32
Calculation factor (Y0):1,04
d1:59.5 mm
e:0.32
Y2:1.88
Y0:1.04
Mass:0.57 kg
Dynamic load, C:76.5 kN
Rating life coefficient, A2:1.4
Static load, C0:97.5 kN
Fatigue limit load, Cu:11.9 kN
Nlim (oil):6,400 rpm
Nlim (grease):4,800 rpm
Min operating temperature, Tmin:-40 °C
Max operating temperature, Tmax:120 °C
Characteristic cage frequency, FTF:0.43 Hz
Characteristic rolling element frequency, BSF:6.7 Hz
Characteristic outer ring frequency, BPF0:7.71 Hz
Characteristic inner ring frequency, BPFI:10.29 Hz
ra max:0.8 mm
r1a max:0.8 mm
Category:Bearings
Inventory:0.0
Minimum Buy Quantity:N/A
Weight / Kilogram:0.59
Product Group:B04334

IRA Hydraulic Pump Technical support and service specialize in the operation of a variety of well-known brands of pumps, valves and spare parts.
such as Rexroth,Yuken,Daikin,Vickers,Dension,Parker,Sumitomo,Tokimec,Nachi,Atos,Komatsu,Kawaski etc.
The following is our comprehensive range:
1.Pistion pump
2.Vane Pump
3.Oil pump
4.Gear pump
If you have any inquiries,please ask me frankly.

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IRA Hydraulic Pump Technical support and service: AddressNo.1875 East Changjiang Road, New District, Wuxi, Jiangsu,China; Phone(Working Time)86-510-85310167; Fax

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