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Old 07-24-2009, 05:31 PM
lynchlawn lynchlawn is offline
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Join Date: Feb 2004
Location: towson,md.
Posts: 14
hydraulic fluid specification update

Can the older -2005-2006 Super Z's (Model 927061) Efi"s and/or walkbehinds be upgraded with SAE 20w50 oil in the hydraulic system? And does Lubrizol still need to be used with an upgrade? What would be the minimal oil rating(CF?).
Old 07-27-2009, 01:19 PM
mowerconsultant's Avatar
mowerconsultant mowerconsultant is offline
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Join Date: Feb 2000
Location: Syracuse, NY
Posts: 9,757
You can use 20w50 in the hydro system, we dont suggest the use of Lubrizol.
You can use this oil in older units also.
Here is the information from our service department.

Hydraulic oil changes in production
January 1, 2008.
Discontinued use of Lubrizol. Due to improvements in todays hydraulic
wheel motor designs, lubrizol is no longer required by our hydraulic
component supplier (except 4600).

August 1, 2008.
Discontinued use of 10w-40 motor oil in all Hustler Mini Z's, Super Mini Z's,
Hustler Z's and Super Z's hydraulic systems to 20w-50 motor oil. Per our
hydraulic supplier recommendation, todays higher horsepower harder
working hydraulic systems need an oil to keep up with the demand, and so
20w-50 is now recommended on Hustler Turf mowers built since August.
Note: For mowers used in cold weather applications, a warm-up period of
five to ten minutes is recommended before the unit is operated.
Former Bad Boy and Hustler Sales Representative

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