DRIVE GP-CIRCLE 9D5895 - Caterpillar

Changing the Metering Unit
Illustration 1 g01073835
Number of the metering unit
The automatic lubrication system offers the ability to change the amount of grease that is supplied per cycle to each grease point. Changing the grease supply amount is completed by installing different sized metering units. Eleven different sizes of metering units are available. The metering units are stamped with numbers that correlate to the capacity of the metering unit. See Table 1 for reference.
Table 1
Metering Unit Number Capacity (cm3) per Lubrication Cycle CAT Part Number
1 0.050 235-9080
2 0.100 178-2735
3 0.150 177-3516
4 0.200 177-3517
6 0.300 178-2740
8 0.400 177-3518
8.5 0.700 221-1585
9 1.000 178-2746
10 2.000 192-6212
11 4.000 279-1435 Purging the System
The system may repeatedly malfunction after the reservoir has been emptied. In this case, the grease lines must be purged. Use the following procedure in order to purge the lines:
Ensure that there is enough grease in the reservoir. Note: Before opening the system, check to be sure that no pressure remains in the system.
Remove the plugs from the distribution blocks that are at the end of every branch of the lubrication system.
Turn on the engine start switch.
Press the test button at the pump for at least 6 seconds. Note: Since the plugs are removed, no grease pressure will build up. When the maximum time expires for the system to pump, the system will automatically move to the other grease line. This process is repeated until the engine start switch is turned off.
Turn off the engine start switch when a solid flow of grease flows from the grease lines with an absence of air.
Install the plugs back into the distribution blocks.
Repeat Step 4, Step 5, and Step 6 until all of the branches of the lubrication system are purged.
Run a single test cycle in order to check that the lubrication system functions correctly. Refilling the Grease Reservoir
Use of the Correct Grease
Table 2
Recommended Lubrication for the Automatic Lubrication System(1)(2)(3)(4)
Grease NLGI Degrees Celsius Degrees Fahrenheit
Caterpillar Autolube 1 -18 +29 0 +85
Caterpillar Autolube 2 -1 +41 +30 +105
Caterpillar Autolube 0 -29 +10 -20 +50
Caterpillar Arctic Platinum(4) 000 -40 +4 -75 +40
Caterpillar Desert Gold 2 +4 +66 +40 +150
(1) In order to use a non-Caterpillar lubricant, the supplier must certify that the lubricant is compatible with Caterpillar grease. Otherwise, each pin joint will require flushing with the new lubricant in order to remove the Caterpillar lubricant. Failure to meet this requirement may lead to failure of a pin joint due to premature breakdown of the lubricant.
(2) The grease that is used with the automatic lubrication system must not contain any graphite or PTFE.
(3) For additional information on the greases in this table, refer to Operation and Maintenance Manual, SEBU6250, "Caterpillar Machine Fluids Recommendations".
(4) The TWIN system operates with standard NLGI 1-2 grease up to −5 °C / −25 °C (23 °F / −13 °F). With low temperature NLGI 000 grease, the possibility exists to reach −40 °C (−40 °F).Refilling the Reservoir
Illustration 2 g01068678
Grease reservoir (1) is located near the rear fender on