TBS/CDC 17 (2360) DTZS:2023  
                                                                                                                                          ICS:75.100  
  
 
 
                         DRAFT TANZANIA STANDARD  
 
 
 
     
 
 
         Off-Road Gear Oil - Specification  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                                                TBS/CDC 17 (2360) DTZS:2023  
                                                                                                                                          ICS:75.100  
  
0 Foreword  
 
This Draft Tanzania Standard is being developed by the Lubricants and Oil Technical 
Committee under the supervision of the Chemicals Divisional Standards Committee  
and it is in accordance with the procedures of the Bureau.  
This Draft Tanzania Standard is the first edition of Off-Road Gea r Oil- Specification   
 
For the purpose of deciding whether a particular requirement of this Tanzania Standard 
is complied with, the final value observed or calculated, expressing the result of a test 
or analysis shall be rounded off in accordance with TZS 4 (see clause 2).  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                                                 TBS/CDC 17 (2360) DTZS:2023  
                                                                                                                                          ICS:75.100  
 1 Scope  
 
This Draft Tanzania Standard specifies requirements, sampling and test methods for 
off-road gear oil - lubricants  intended for the lubrication of hydraulic systems, power 
shift, axles and final drives of non -automobile equipment  including but not limited to 
excavator, cranes, backhoes and bulldozers that are used for mining activities, 
construction activities and oth er off -road application . 
 
2 Normative references  
 
The following referenced documents are indispensable for the application of this 
document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any 
amendments) applies.  
ASTM D 92 , Standard test method for flash and fire points by Cleveland open cup  
ASTM D 97 , Standard test method for pour point of petroleum products  
ASTM D 2270, Standard practice for calculating viscosity index  from kinematic 
viscosity at 40 and  100 °C.  
ASTM D 445 /7042 , Standard test method for kinematic viscosity of transparent and 
opaque liquids  
ASTM D 1298 , Standard Test Method for Density, Relative Density, or API Gravity of 
Crude Petroleum and Liquid Petroleum Products by Hydrometer Method  
ASTM D 4052 , Standard test method for density and relative density of liquids by 
digital density meter  
ISO 24153 , Random Sampling and randomization procedures  
TZS 668 , Petroleum Industry -Terminology  
 
3 Terms and def initions  
 
For the purpose of this Tanzania Standard the following definitions and those in  
TZS 668 (see clause 2) shall apply:  
 
3.1 additives  
 
Materials added to base oil, usually in small amount to impart or enhance desirable 
properties or to suppress undesirable properties.  
 
3.2 lubricant  
 
Any substance which when interposed between two surfaces in relative motion, 
reduces friction or increases wear resistance.  
 
3.3 Gear oil  
                                                                                 TBS/CDC 17 (2360) DTZS:2023  
                                                                                                                                          ICS:75.100  
 Any fluid lubricant used in gears (gearboxes) for reduction of friction and wear of the 
gear tooth surfaces and removal of the heat .  
 
3.4 Off-road  
       
      off public road or highway  or on rough ground, away from normal roads  
 
 
4 Requirements  
 
4.1 General requirements  
 
4.1.1 Off -road gear oil shall be visually clear and bright  
4.1.2 Off -road gear oil shall meet at least performance requirements of caterpillar TO -
4 or equivalent specifications  
 
4.2 Specific requirements  
  Off-road gear oil shall conform to the specific requirements given in Table  1 when 
tested in accordance with the methods prescribed therein.  
 
Table 1: Specific requirements for off -road gear oil  
 
 
                                 
                                                             Table 1  
 1 2 3 4 5 6  
S/n SAE Viscosity 
Grade  10W 30 50 60 Test method  
Properties  
i.  Density @ 
29.5°C, kg/m3 To be reported  ASTM D 1298/4052  
ii.  Kinematic viscosity 
at 40 °C, mm2/s     
ASTM D 445/7042  
         Min. 38 85 190 295 
           Max.  50 100 225 388 
iii.  
 Kinematic 
viscosity at 100 
°C, mm2/s     
ASTM D 445/7042   
Min. 5.5 10 17 21.9 
Max.  8.5 12.6 20 27 
iv Viscosity Index, 
Min 
               90 90 90 90 ASTM D 2270  
v Flash point, °C 
Min 
 200 215 220 230 ASTM D 92 
vi Pour Point,  °C Max -30 -21 -9 -9 ASTM D 97                                                                                  TBS/CDC 17 (2360) DTZS:2023  
                                                                                                                                          ICS:75.100  
  
 
 
 
 
5 Labelling and packaging  
5.1 Labelling  
 
The following information shall appear on the label of container(s)  in English/Swahili 
or as agreed between the manufacturer and purchaser  
 
i) Manufacturer ’s name and address,  
ii) Name of the products, trade mark/name if any,  
iii) Batch number and date of manufacture   
iv) Net content,  
v)  Performance level  
vi) Viscosity grade  
vii) Expiry date  
 
 
5.2 Packaging  
 
Off-road gear oil shall be packed in suitable containers as agreed between supplier 
and purchaser, including but not limited to  drums and plastic jerry cans. They shall be 
properly sealed to avoid leakage.  
 
 
 
 
 
 
 
 
 
 
 
 
6 Sampling  
  
 Sampling of off -road gear  oil shall be done accordance to ISO 24153  
 
 
 
 
 
 
 
 
                                                                                 TBS/CDC 17 (2360) DTZS:2023  
                                                                                                                                          ICS:75.100