Hydraulic Rotator Cycle Time - Check
Operate the host machine at high idle during this check.
- Move the host machine and the work tool to a smooth level location.
- Conduct a visual inspection of all hoses, fittings, and components. If any leaks are observed or if any damage is observed, repair the problem before you perform this check.
- Start the host machine and run the host machine at high idle. Operate the implements until the hydraulic oil reaches normal operating temperature.
- Raise the work tool and position the work tool in a perpendicular position. Refer to Illustration 1.
Show/hide table
 | |
| Illustration 1 | g00729409 |
- Note the starting position of the work tool. Rotate the work tool to the left for one minute. Record the number of rotations that are completed in that time.
- Note the starting position of the work tool. Rotate the work tool to the right for one minute. Record the number of rotations that are completed in that time.
- If the rpm were within the specification, the work tool is rotating properly. If the rpm were not within the specification, check the oil flow and the oil pressure of the host machine. Refer to the Service Manual, "Host Machine Pressure and Flow - Test". The oil flow to the rotator must be 80 ± 10 L/min (21.1 ± 2.6 US gpm). The oil pressure to the rotator must be 14000 ± 1000 kPa (2030 ± 145 psi).
- If an adjustment was made to the host machine, repeat the check. If an adjustment for the host machine was not necessary, proceed to the next step.
- If the rpm is not within the specification, check the oil flow of the hydraulic rotator. Refer to Service Manual, "Hydraulic Rotator Oil Flow - Test".
Caterpillar Information System:
320C Excavator Fine Swing Control - If Equipped
320C Excavator Automatic Engine Speed Control (AEC)
320C Excavator Engine Speed Control
G112, G115, G125 and G140 Mechanical Grapple Mounting Bracket - Remove and Install
MP-15, MP-20, MP-30 and MP-40 Multi Processors Control Valve Pressure (Hydraulic Rotator) - Test
3126B Engines Electrical System
320C Excavator Window Wiper and Washer Control
H140C S and H160C S Hydraulic Hammers Mounting Bracket Bolts - Tighten
320C Excavator Cab Door
325C and 325C L Excavator Alternate Exit
MP-15, MP-20, MP-30 and MP-40 Multi Processors Speed Control Valve (Hydraulic Cylinder) - Test and Adjust
330C Excavator Window (Front)
G112, G115, G125 and G140 Mechanical Grapple Mounting Bracket
3176C and 3196 Engines for Caterpillar Built Machines Intermittent Low Power or Power Cutout
3126B Engines Electronic Control System Components
G112, G115, G125 and G140 Mechanical Grapple Mounting Bracket
G112, G115, G125 and G140 Mechanical Grapple Mounting Bracket
MP-15, MP-20, MP-30 and MP-40 Multi Processors Shear Jaw
JF Series Starting Motor Pinion Continues to Engage after Engine Starts
MP-15, MP-20, MP-30 and MP-40 Multi Processors Multi-Processor Housing
MP-15, MP-20, MP-30 and MP-40 Multi Processors Multi-Processor Housing
3176C and 3196 Engines for Caterpillar Built Machines Poor Acceleration or Response
MP-15, MP-20, MP-30 and MP-40 Multi Processors Multi-Processor Housing
3126B Engines General Information