EXCEPTIONAL PROTECTION FROM THE ELEMENTS, GUARANTEED - Stemco

1 An EnPro Industries companyan EnPro Industries companyMaking the Roadways Safer EXCEPTIONAL PROTECTION FROM THE elements , GUARANTEEDS entinel Hub Cap technology provides an unmatched filtering system to eliminate contamination from dirt, dust, sand and water, all while making it easy to visually monitor lube levels. Featuring an innovative design and durable construction, Sentinel hub caps help extend equipment life, reduce maintenance and increase Hub Cap Provides a tamper-proof hub cap system for maximum PROTECTION and maintenance-free ESP (Extended Service Plug) Allows Sentinel Technology to be retrofitted on existing wheel ends with drive axle plugs or aftermarket Class Innovation The only water proof hub cap in the Order OEM or retrofit in the aftermarket on a trailer, drive or steer Corrosion-Free Option Stemco Defender hub caps with Sentinel Technology are made from composite materials with stainless steel reinforcement inserts that will not relieve vacuum, the Sentinel interior check valve lifts slightly, drawing air into the wheel end through the water-resistant filter.

2 The duck-bill check valve remains closed, blocking dirt, grime and other contaminants from relieve pressure, the duck-billed pressure relief valve opens, allowing pressure to vent out. The umbrella check valve remains closed, stopping lubricant from leaking out and contaminants from flowing second O-ring increases plug | 877-232-9111 | 905-206-97005775 McLaughlin Road Mississauga, Ontario L5R 3P7 | CanadaAustralia | 011-61-2-9793-2599 Unit 6 CNR Rookwood & Muir Roads Yagoona NSW 2199 | AustraliaUnited States | 800-527-8492 | 903-758-9981300 Industrial Boulevard Longview, Texas 75602 | US Making the Roadways Safer Mexico | 444-804-1736 Eje Central Sahop No 215, Zona Ind San Luis Potosi SLP 78395 | EnPro Industries companyan EnPro Industries companySENTINEL: KEEPING WATCH OVER YOUR WHEEL ENDS Prevents dirt and water from contaminating the oil, thereby extending seal and bearing life.

3 Dramatically reduces contaminant build-up on hub cap windows, allowing for an accurate determination of lube levels. Eliminates early oil breakdown by preventing water contamination as a result of submerged axles. Provides maximum PROTECTION for maintenance-free wheel end systems. Improves performance and lowers overall maintenance HUB CAPSTEMCO BASE PART OF BOLTSGASKETNUMBEROIL WINDOW KITGREASE WINDOW KIT4009348-4009349-40095 1/2"5 / 16"6330-3009359-6112359-61204013348-4013 349-40135 1/2"5 / 16"5330-3013359-6112359-61204046348-4046 349-40465 1/2"5 / 16"6330-3009359-6112359-61204075348-4075 349-40756 1/4" x 8" UN(M)330-3077359-6112359-61204095348-409 5349-40955 1/2"5 / 16"6330-3009359-6112359-6120419534 8 - 4195349- 41956 3/4"5 / 16"63 3 0 - 3118359-6112359-61204281348-4281N/A5 17/ 32 "3/8"6330-3122359-6112359-6120 INTEGRATED SENTINEL HUB CAPSTEMCO BASE PART OF BOLTSGASKETNUMBEROIL WINDOW KITGREASE WINDOW KIT4009356-4009358-40095 1/2"5/16"6330-3009359-6145359-6146400936 6-4009368-40095 1/2"5/16"6330-30094013356-4013358-40135 1/2"5/16"5330-3013359-6145359-6146402435 6-4024358-40244 1/2"5/16"6330-3024359-6143359-6144402436 6-4009368-40095 1/2"5/16"6330-30094025356-4025358-40255 7/8"5/16"6330-3025359-6143359-6144404635 6-4046358-40465 1/2"5/16"6330-3009359-6145359-6146407535 6-4075358-40756 1/4" x 8" UN(M)

4 330-3077359-6145359-61464080356-4080358- 408063/8"6330-3060359-6143359-6144409535 6-4095358-40955 1/2"5/16"6330-3009359-6145359-6146411935 6-4119358-411975/8"8330-3090359-6145359- 61464150356-4150358-41504 1/2"5/16"5330-3150359-6143359-6144419535 6-4195358-41956 3/4"5/16"6330-3118359-6145359-6146419536 0-4195368-41956 3/4"5/16"6330-31184195366-4195368-41956 3/4"5/16"6330-3118 SENTINEL ESP(EXTENDED SERVICE PLUG) Stemco PART Plug Blister Pack (2/pk)359-6125 ESP Plugs (bulk pack of 50)SENTINEL HUB CAP BULK PACK Stemco PART Hub Capwith ESP Plug Bulk Pack (50/box)303-5009343-4009 Hub Capwith ESP Plug Bulk Pack (50/box)SENTINEL ESP FILTERED VENTSTEMCO PART Axle Vent(3/8 adapter) Stemco , Sentinel and Defender are registered trademarks of Stemco Products Inc.

5 2018 Stemco Products Inc. Printed in the USA. Part No. 571-3038 | Rev. 3/18