Fork Oil SHF 150

Jugs_S

Jugs_S

Senior member
Location
Sydney
Was researching the Laverda fork oil from the Workshop Manual SHF 150 (what is that ??) 240ml

found this

ISO Grade   Equivalent                        Viscosity                              Density
                  SAE Grade     Centistokes       10-6 reyns (lb s/in2)  kg/m3 lb/in3
                                  40 oC    100 oC        104 oF 212 oF

32             10W           32         5.4         4           0.6       857 0.0310
46             20             46         6.8         5.7         0.8       861 0.0311
68             20W           68         8.7         8.5         1.1       865 0.0313
100             30           100       11.4       12.6         1.4       869 0.0314
150             40           150       15         19           1.8       872 0.0315
220             50           220       19.4       27.7         2.4       875 0.0316

(http://www.engineeringtoolbox.com/iso-grade-oil-d_1207.html)

So SHF150 is SAE 40
the 150 seems to reference the Centistokes

In the owners manual for the 1000 it says "Total Equivis 10" 200ml which seems to be SAE 10
 
If you put SAE 40 in your forks, you'd be rapidly draining it back out again to restore damping action! ATF (automatic gearbox transmission fluid) was sometimes mentioned as an alternative.  A quick Google suggests the SHF reference may be a type of hydraulic oil....
My preference is to use a fluid that is intended for motorcycle fork use...readily available and hopefully designed for the job.  In the past I've sometimes blended a 7.5 weight oil, but I reckon my conventional forks must now be sufficiently worn for 10 weight to work fine.
 
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