MIRROR-CONVEX 1329983 - Caterpillar

Oil Compartment Filtration Times for 231-6284 Filter Cart
If an on-line portable particle counter is not available to diagnose and track when the contaminant level has lowered to an acceptable level, refer to the following equation. This equation relates to the 231-6284 Filter Cart Gp only. Other filtration units will use different equation references. The units that use different equations will be noted when appropriate.
Illustration 23 g02977749
Oil compartment filtration equation
(A) Compartment oil capacity (gal)
(B) Pulses per minute
(C) Approximate filtration timePulses Per Minute Definition
Each air discharge or each stroke of the air operated filter pump delivers one pulse of oil. The internal pump shaft will slide left (one pulse), and then to the right (one pulse). Each pulse delivers oil in both directions. Another way of determining pulses is to listen for the "tuk-chuk" of two pulses. Count the number of pulses in 1 minute for use in the above equation.Example
A D11R Track Type Tractor has 60.5 L (16 US gal) of SAE 60W oil. The filter cart is operating at 100 pulses per minute. The approximate filtration time should be 38 minutes.ISO 4406:1999 Method for Coding the Level of Contaminates by Solid Particles
ISO is a worldwide federation of national standards bodies. The ISO 4406:1999 specifies the code to be used in defining the quantity of solid particles in the fluid. This ISO code is used in any given hydraulic fluid power system. An automatic particle counter derives the equivalent size of a particle from the particle cross sectional area. Particle counts are affected by various factors. These factors include:procurement of the sample, the sample container, and particle counting accuracy when used and the particle count cleanliness. Proper care should be taken during the sample procurement. Proper care will ensure that the sample obtained is representative of the fluid circulating in the system.The code for contamination levels using automatic particle counters is composed of three scale numbers. ExampleX/Y/Z"X" - The number of particles that is equal to or larger than 4 microns."Y" - The number of particles that is equal to or larger than 6 microns."Z" - The number of particles that is equal or larger than 14 micronsCurrently Caterpillar does not require the reporting of the "X" scale number since the hydraulic tolerances exceed the 4 micron value, therefore a "-" is used in place of the "X". For example, a particle count is read as -/Y/Z, meaning that there was no requirement to count particles equal to or larger than 4 microns.Other Applications for the 231-6284 Filter Cart
This portion of the guideline is to show the various applications this cart can be used for. Due to the numerous adapters required for various machine applications, the technician will need to identify and fabricate adapters for each individual machine.The filter cart is only effective when used on machines with 113 L (30 US gal) or less of 60W or lighter oil. Due to the capacity and flow limitations, this cart may not be effective on all machines. See the following examples