MAINTENANCE FOWA

HEN00015-00

MAINTENANCE COURSE

Engine Oil Handling for HPCRKomatsu Engine

MAINTENANCE FOWA

FOWA stands for Fuel, Oil, Water and Air

HPCR:High Pressure Common Rail

1 High quality engine oil is required .................................... 32 Example of engine failure due to engine oil

(1) A failure due to nonconformity engine oil grade................ 4(2) A failure due to low viscosity engine oil ......................... 5(3) A failure due to low level of engine oil ........................... 6

7 points of Engine oil handling ........................................... 7Point 1 Check item before starting ....................................... 8Point 2 When selecting engine oil ....................................... 9Point 3 When purchasing engine oil .................................... 10Point 4 When planning the engine oil replacement .................. 11Point 5 When replacing engine oil filter ............................... 12Point 6 When replacing engine oil (1)

Be careful about foreign matter getting into the oil ........ 13Point 7 When replacing engine oil (2)

Re-check the engine oil level .................................. 14

Contents

3

Optimum Komatsu DH oilto diesel engine for

KOMATSU machinery !!

Keep a combustion cham

ber clean

Disperse soot finely

Based on data comparisonmade by Komatsu Komatsu DH

series oil High qualityCommercially

availableDH-1 oil

APICF-4

CF

CD

JASO: Japanese AutomobileStandards Organization

API: American PeteroleumInstitute

1 High quality engine oil is required

(1) High quality engine oil is required for theexhaust gas regulation

(2) Use Komatsu genuine oil DH serieswhen replacing and refilling engine oil

4

(1) A failure due to nonconformity engine oil grade

2 Example of engine failure due to engine oil

OK NG

EO15W40-DH Commercially available oil15W40-CD

Better detergency performance oil

DH oil disperses soot finely

Prevent piston ring sticking

Poor detergency performance oil

CD oil keeps soot size as it is

Piston ring sticking faster

Soot willaccumulate

in piston ringgroove

Less soot will

accumulatein piston ring

groove

5

(2) A failure due to low viscosity engine oil

6

(3) A failure due to low level of engine oil

7 points ofEngine oil handling

8

When the oil level is too high

The oil may cause overheating due to heat generation or power loss.

When the oil level is too low

The lubricating system becomes in short supply of oil by sucking air and pistons and bearings may seizure in a short period of time.

Engine oil filler port

BetweenH and L marks

Point 1 Check item before starting

(1) Check the oil level before starting without fail.(2) Set the engine oil level between H and L mark.

9

Point 2 When selecting engine oil

(1) Use adequate multi-grade oil as engine oil in accordance with the atmosphere temperature of the job site.(2) Multi-grade oil has resistance to temperature change and keeps appropriate viscosity.

Furthermore, it has good lubricating property and prevents wear of equipment.(3) When changing the type of engine oil, replace all the oil of specified capacity. Mixing of oil remaining in oil passages may cause no trouble.

-30 -20 -10 0 10 20 30 40 50 C-22 -4 14 32 50 68 86 104 122F

Ambient TemperatureReservoir Fluid Type

RecommendedKomatsu Fluids

Engine oil pan Engine oil

Komatsu EOS0W30

Komatsu EOS5W40

Komatsu EO10W30-DH

Komatsu EO15W40-DH

Komatsu EO30-DH

10Point 3 When purchasing engine oil

DH series

11

Point 4 When planning the engine oil replacement

(1) For oil change, observe the oil change interval specified in the Operation and Maintenance Manual.(2) Engine oil deteriorates with time and heat even if high quality oil is used.(3) Ideal oil change interval extends the machine life.

Observe specifiedoil change intervalcertainly.

12Point 5 When replacing engine oil filter

(1) Komatsu genuine oil filter features improved filtration performance and extended life.(2) Be sure to use Komatsu genuine parts and replace the filter when changing the engine oil.

Comparison of conventional and new Komatsu genuine oil filters [for PC200 series machines]

1. Comparison of conventionaland new filter

2. Change in filter material

Conventionalfilter

2 layer filter

New filter

3 layer filter

New oil filter has three types of filtration layer and catches dustand sludge both at the surface and inside the filter material.(Multilayer overlapped fiber filter material)

Current material

Cellulose filtermaterial

Micro fiberglassfilter material

Improved material to meet HPCR

Coarse layer Intermediate layer Minute layer

13

Point 6 When replacing engine oil (1)

Be careful about foreign matter getting into the oil(1) To prevent water and foreign matter from getting into the oil, with special care.(2) Do not use dirty hoses and containers for refill.(3) Avoid oil replacing outdoors in a rainy day, windy day, or dusty atmosphere.

14Point 7 When replacing engine oil (2)

Re-check the engine oil level(1) After replacing the engine oil and oil filter, start the engine and recheck the oil level after the engine

stop. If the oil is insufficient, add it.(2) Check for oil leakage in the vicinity of the filter mounting surface.

* Refer to the Operation and Maintenance Manual for details of replacement interval and method.

H

L

H

LAdd

Oil level

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HEN00015-00 Materials and specifications are subject to change without notice.is a trademark of Komatsu Ltd. Japan.