Poulan Pro Owners Manual, 2009 - Enlarge page 1 
From inside (document excerpt):
Parts List No. Date 545103424 Replaces 545103424 – 7/14/08 R MODEL PARTS LIST NOTE : Illustration may differ from actual model due to design changes. PPB5000P Att. Page: DANGER STAND CLEAR 50 FT. All repairs, adjustments and maintenance not described in the Operator’s Manual must be performed by Qualified Service Personnel.